[ { "key": "QYB5C859", "version": 13, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/QYB5C859", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/QYB5C859", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/14/items/T45TTNMF", "type": "application/json" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "numChildren": 0 }, "data": { "key": "QYB5C859", "version": 13, "parentItem": "T45TTNMF", "itemType": "attachment", "linkMode": "imported_url", "title": "ScienceDirect Full Text PDF", "accessDate": "2018-03-22T23:17:35Z", "url": "https://ac.els-cdn.com/S0927025618300296/1-s2.0-S0927025618300296-main.pdf?_tid=489145a2-2aa4-48f5-a1ca-39bb8f519687&acdnat=1521760812_86cffd4fd00b420cbd9f393086d1db09", "note": "", "contentType": "application/pdf", "charset": "", "filename": "Bhaskar and Abinandanan - 2018 - Effect of different solute diffusivities on precip.pdf", "md5": "2c6fc03c08301aa16d7fddfd9748596c", "mtime": 1521760655000, "tags": [], "relations": {}, "dateAdded": "2018-03-22T23:17:35Z", "dateModified": "2018-03-22T23:17:35Z" } }, { "key": "IIMFEJQI", "version": 14, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/IIMFEJQI", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/IIMFEJQI", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/14/items/T45TTNMF", "type": "application/json" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } } }, "data": { "key": "IIMFEJQI", "version": 14, "parentItem": "T45TTNMF", "itemType": "attachment", "linkMode": "imported_url", "title": "ScienceDirect Snapshot", "accessDate": "2018-03-22T23:17:31Z", "url": "https://www.sciencedirect.com/science/article/pii/S0927025618300296?via%3Dihub", "note": "", "contentType": "text/html", "charset": "utf-8", "filename": "S0927025618300296.html", "md5": "d6bb17e44cd76639768a6347e8910096", "mtime": 1521760651000, "tags": [], "relations": {}, "dateAdded": "2018-03-22T23:17:31Z", "dateModified": "2018-03-22T23:17:31Z" } }, { "key": "T45TTNMF", "version": 11, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/T45TTNMF", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/T45TTNMF", "type": "text/html" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "creatorSummary": "Bhaskar and Abinandanan", "parsedDate": "2018-04-15", "numChildren": 2 }, "data": { "key": "T45TTNMF", "version": 11, "itemType": "journalArticle", "title": "Effect of different solute diffusivities on precipitate coarsening in ternary alloys", "creators": [ { "creatorType": "author", "firstName": "M. S.", "lastName": "Bhaskar" }, { "creatorType": "author", "firstName": "T. A.", "lastName": "Abinandanan" } ], "abstractNote": "According to Gibbs phase rule, ternary two phase alloys have a single degree of freedom at equilibrium at a given temperature. Thus, multiple precipitate-matrix equilibrium compositions are possible at the interface. From Philippe-Voorhees’ (PV) theory (Philippe and Voorhees, 2013), it is known that during coarsening in multicomponent alloys, precipitate-matrix compositions at the interface during coarsening are not just dependent on the Gibbs-Thomson effect but also on the relative mobilities of the solute elements. Our computer simulations, based on a phase field model, show that this effect of different solute diffusivities on size-dependent particle composition is more pronounced in alloys richer in the slower diffusing solute.", "publicationTitle": "Computational Materials Science", "publisher": "", "place": "", "date": "April 15, 2018", "volume": "146", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "73-83", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Computational Materials Science", "DOI": "10.1016/j.commatsci.2018.01.022", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0927025618300296", "accessDate": "2018-03-22T23:17:14Z", "PMID": "", "PMCID": "", "ISSN": "0927-0256", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Coarsening", "type": 1 }, { "tag": "Phase field model", "type": 1 }, { "tag": "Precipitation", "type": 1 }, { "tag": "Simulation", "type": 1 }, { "tag": "Ternary", "type": 1 } ], "collections": [ "MGZMC9PF" ], "relations": {}, "dateAdded": "2018-03-22T23:17:14Z", "dateModified": "2018-03-22T23:17:14Z" } }, { "key": "UUDS3GDX", "version": 9, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/UUDS3GDX", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/UUDS3GDX", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/14/items/8ZNU5VTT", "type": "application/json" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "numChildren": 0 }, "data": { "key": "UUDS3GDX", "version": 9, "parentItem": "8ZNU5VTT", "itemType": "attachment", "linkMode": "imported_url", "title": "ScienceDirect Full Text PDF", "accessDate": "2016-12-14T16:34:56Z", "url": "http://www.sciencedirect.com/science/article/pii/S1359645416308412/pdfft?md5=0d8da63050fca9e9b9738fc65ac54939&pid=1-s2.0-S1359645416308412-main.pdf", "note": "", "contentType": "application/pdf", "charset": "", "filename": "Buranova et al. - 2017 - Al3(Sc,Zr)-based precipitates in Al–Mg alloy Effe.pdf", "md5": "20f1a130571bdf38eb7d5182bbae47d4", "mtime": 1481733314000, "tags": [], "relations": {}, "dateAdded": "2016-12-14T16:34:56Z", "dateModified": "2016-12-14T16:35:14Z" } }, { "key": "DTK9Q7BP", "version": 9, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/DTK9Q7BP", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/DTK9Q7BP", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/14/items/8ZNU5VTT", "type": "application/json" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } } }, "data": { "key": "DTK9Q7BP", "version": 9, "parentItem": "8ZNU5VTT", "itemType": "attachment", "linkMode": "imported_url", "title": "ScienceDirect Snapshot", "accessDate": "2016-12-14T16:34:56Z", "url": "http://www.sciencedirect.com/science/article/pii/S1359645416308412", "note": "", "contentType": "text/html", "charset": "utf-8", "filename": "S1359645416308412.html", "md5": "874295e434c1e097897cdc4a24218368", "mtime": 1481733297000, "tags": [], "relations": {}, "dateAdded": "2016-12-14T16:34:56Z", "dateModified": "2016-12-14T16:34:56Z" } }, { "key": "8ZNU5VTT", "version": 8, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/8ZNU5VTT", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/8ZNU5VTT", "type": "text/html" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "creatorSummary": "Buranova et al.", "parsedDate": "2017-02-01", "numChildren": 2 }, "data": { "key": "8ZNU5VTT", "version": 8, "itemType": "journalArticle", "title": "Al3(Sc,Zr)-based precipitates in Al–Mg alloy: Effect of severe deformation", "creators": [ { "creatorType": "author", "firstName": "Yu.", "lastName": "Buranova" }, { "creatorType": "author", "firstName": "V.", "lastName": "Kulitskiy" }, { "creatorType": "author", "firstName": "M.", "lastName": "Peterlechner" }, { "creatorType": "author", "firstName": "A.", "lastName": "Mogucheva" }, { "creatorType": "author", "firstName": "R.", "lastName": "Kaibyshev" }, { "creatorType": "author", "firstName": "S. V.", "lastName": "Divinski" }, { "creatorType": "author", "firstName": "G.", "lastName": "Wilde" } ], "abstractNote": "Precipitate evolution in an AA5024 Al-based alloy containing Sc and Zr is investigated in different states: as-cast, extruded and severely deformed. An overview of the microstructure is given and the evolution of particle size and morphology as a function of mechano-thermal processing is investigated, with an emphasis on the Al3(Sc,Zr)-based precipitates. The precipitates are found to maintain their coherence with the matrix after the interaction with dislocations and low-angle grain boundaries as it is revealed by atomistic simulations and by the so-called Geometric Phase Analysis of the local strain fields. It is established that the precipitates can loose their coherency with the matrix during the severe plastic deformation, that decreases generally grain boundary pinning effect and promotes recrystallization.", "publicationTitle": "Acta Materialia", "publisher": "", "place": "", "date": "February 1, 2017", "volume": "124", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "210-224", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Acta Materialia", "DOI": "10.1016/j.actamat.2016.10.064", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S1359645416308412", "accessDate": "2016-12-14T16:34:56Z", "PMID": "", "PMCID": "", "ISSN": "1359-6454", "archive": "", "archiveLocation": "", "shortTitle": "Al3(Sc,Zr)-based precipitates in Al–Mg alloy", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Al-Mg-Sc-Zr alloys", "type": 1 }, { "tag": "Chemical heterogeneity", "type": 1 }, { "tag": "Severe plastic deformation", "type": 1 } ], "collections": [ "MGZMC9PF" ], "relations": {}, "dateAdded": "2016-12-14T16:34:56Z", "dateModified": "2016-12-14T16:34:56Z" } }, { "key": "E7AWD5D9", "version": 7, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/E7AWD5D9", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/E7AWD5D9", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/14/items/2DTSJNAR", "type": "application/json" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "numChildren": 0 }, "data": { "key": "E7AWD5D9", "version": 7, "parentItem": "2DTSJNAR", "itemType": "attachment", "linkMode": "imported_url", "title": "ScienceDirect Full Text PDF", "accessDate": "2015-09-21T18:08:20Z", "url": "http://www.sciencedirect.com/science/article/pii/S1359645415006205/pdfft?md5=8d639c7bdb5297f095b4bfa708961e69&pid=1-s2.0-S1359645415006205-main.pdf", "note": "", "contentType": "application/pdf", "charset": "", "filename": "Shen et al. - 2015 - Ultrafine-grained Al–0.2Sc–0.1Zr alloy The mechan.pdf", "md5": "a08ba0439460f024f8b74665a88fe701", "mtime": 1442858922000, "tags": [], "relations": {}, "dateAdded": "2015-09-21T18:08:20Z", "dateModified": "2015-09-21T18:08:42Z" } }, { "key": "VE2SGEDW", "version": 7, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/VE2SGEDW", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/VE2SGEDW", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/14/items/2DTSJNAR", "type": "application/json" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } } }, "data": { "key": "VE2SGEDW", "version": 7, "parentItem": "2DTSJNAR", "itemType": "attachment", "linkMode": "imported_url", "title": "ScienceDirect Snapshot", "accessDate": "2015-09-21T18:08:20Z", "url": "http://www.sciencedirect.com/science/article/pii/S1359645415006205", "note": "", "contentType": "text/html", "charset": "utf-8", "filename": "S1359645415006205.html", "md5": "bda7fb9b740b32d4ea676782e12a479c", "mtime": 1442858902000, "tags": [], "relations": {}, "dateAdded": "2015-09-21T18:08:20Z", "dateModified": "2015-09-21T18:08:20Z" } }, { "key": "2DTSJNAR", "version": 6, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/2DTSJNAR", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/2DTSJNAR", "type": "text/html" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "creatorSummary": "Shen et al.", "parsedDate": "2015-11", "numChildren": 2 }, "data": { "key": "2DTSJNAR", "version": 6, "itemType": "journalArticle", "title": "Ultrafine-grained Al–0.2Sc–0.1Zr alloy: The mechanistic contribution of nano-sized precipitates on grain refinement during the novel process of accumulative continuous extrusion", "creators": [ { "creatorType": "author", "firstName": "Y. F.", "lastName": "Shen" }, { "creatorType": "author", "firstName": "R. G.", "lastName": "Guan" }, { "creatorType": "author", "firstName": "Z. Y.", "lastName": "Zhao" }, { "creatorType": "author", "firstName": "R. D. K.", "lastName": "Misra" } ], "abstractNote": "We elucidate the potential significance of nanosized, Al3(Sc, Zr), precipitates in obtaining ultrafine-grained structure in an Al–0.2Sc–0.1Zr alloy during the novel process, referred as accumulative continuous extrusion forming (ACEF). The grain size of the alloy was dramatically refined from 100 μm to 800 nm through continuous dynamic recrystallization (CDRX). The effectiveness of nanosized precipitates on CDRX was pronounced with increase in the ratio of the volume fraction (Fv) to the diameter (d) of the Al3(Sc, Zr) precipitates. Nanosized Al3(Sc, Zr), precipitates promoted grain refinement through three mechanisms: (i) the precipitates facilitated retention of high dislocation density in the alloy by promoting the generation of dislocation and pinning dislocation slip, which increased the driving force for CDRX, (ii) promoted the formation of deformation bands, providing sites for activation of CDRX, and (iii) activated CDRX near the grain boundary.", "publicationTitle": "Acta Materialia", "publisher": "", "place": "", "date": "November 2015", "volume": "100", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "247-255", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Acta Materialia", "DOI": "10.1016/j.actamat.2015.08.043", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S1359645415006205", "accessDate": "2015-09-21T18:08:20Z", "PMID": "", "PMCID": "", "ISSN": "1359-6454", "archive": "", "archiveLocation": "", "shortTitle": "Ultrafine-grained Al–0.2Sc–0.1Zr alloy", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Accumulative extrusion process", "type": 1 }, { "tag": "Aluminum–scandium alloy", "type": 1 }, { "tag": "Grain refinement", "type": 1 }, { "tag": "Precipitates", "type": 1 } ], "collections": [ "MGZMC9PF" ], "relations": {}, "dateAdded": "2015-09-21T18:08:20Z", "dateModified": "2015-09-21T18:08:20Z" } }, { "key": "JCB46FGB", "version": 4, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/JCB46FGB", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/JCB46FGB", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/14/items/GE3AZTPQ", "type": "application/json" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "numChildren": 0 }, "data": { "key": "JCB46FGB", "version": 4, "parentItem": "GE3AZTPQ", "itemType": "attachment", "linkMode": "imported_url", "title": "ScienceDirect Full Text PDF", "accessDate": "2015-09-21T18:02:44Z", "url": "http://www.sciencedirect.com/science/article/pii/S0921509315303002/pdfft?md5=9e76caf07ecb68696eb6fb1dacf61d07&pid=1-s2.0-S0921509315303002-main.pdf", "note": "", "contentType": "application/pdf", "charset": "", "filename": "Cao et al. - 2015 - Achieving high superplasticity of a new Al–Mg–Sc–Z.pdf", "md5": "efe355c17b0e1f2ed3aa30661f374fb9", "mtime": 1442858597000, "tags": [], "relations": {}, "dateAdded": "2015-09-21T18:02:44Z", "dateModified": "2015-09-21T18:03:17Z" } }, { "key": "GE3AZTPQ", "version": 6, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/GE3AZTPQ", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/GE3AZTPQ", "type": "text/html" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "creatorSummary": "Cao et al.", "parsedDate": "2015-10-28", "numChildren": 2 }, "data": { "key": "GE3AZTPQ", "version": 6, "itemType": "journalArticle", "title": "Achieving high superplasticity of a new Al–Mg–Sc–Zr alloy sheet prepared by a simple thermal–mechanical process", "creators": [ { "creatorType": "author", "firstName": "Xiaowu", "lastName": "Cao" }, { "creatorType": "author", "firstName": "Guofu", "lastName": "Xu" }, { "creatorType": "author", "firstName": "Yulu", "lastName": "Duan" }, { "creatorType": "author", "firstName": "Zhimin", "lastName": "Yin" }, { "creatorType": "author", "firstName": "Liying", "lastName": "Lu" }, { "creatorType": "author", "firstName": "Yingjun", "lastName": "Wang" } ], "abstractNote": "A new fine-grained Al–Mg–Sc–Zr alloy sheet with the grain size of 2.5 μm was prepared by simple rolling and thermal treatment process. Superplastic investigations in the temperature range of 450–550 °C and initial strain rate range of 1×10−3 s−1–1×10−1 s−1 show that a maximum elongation of 3250% is achieved at 525 °C and 5×10−3 s−1. The alloy also exhibits excellent superplastic ductility (>2390%) in the temperature interval 475–500 °C at 5×10−2 s−1. Analyses on the superplastic data reveal that the average values of the strain rate sensitivity and activation energy of the Al–Mg–Sc–Zr alloy are about 0.45 and 83 KJ/mol, respectively. The microstructure results show that the studied alloy is characterized by a high fraction of low angle grain boundaries and strong Copper, Brass and Cube texture. During superplastic deformation, low angle grain boundaries gradually transfer into high angle grain boundaries and the grains gradually orientate randomly. The fine coherent Al3(Sc, Zr) particles play an important role in obtaining excellent superplasticity. Grain boundary sliding is the predominant deformation mechanism.", "publicationTitle": "Materials Science and Engineering: A", "publisher": "", "place": "", "date": "October 28, 2015", "volume": "647", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "333-343", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Materials Science and Engineering: A", "DOI": "10.1016/j.msea.2015.08.052", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0921509315303002", "accessDate": "2015-09-21T18:02:44Z", "PMID": "", "PMCID": "", "ISSN": "0921-5093", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Al–Mg–Sc–Zr alloy", "type": 1 }, { "tag": "Grain boundary sliding", "type": 1 }, { "tag": "Microstructure", "type": 1 }, { "tag": "Superplasticity", "type": 1 } ], "collections": [ "MGZMC9PF" ], "relations": {}, "dateAdded": "2015-09-21T18:02:44Z", "dateModified": "2015-09-21T18:02:44Z" } }, { "key": "TBX5VMDN", "version": 4, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/TBX5VMDN", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/TBX5VMDN", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/14/items/GE3AZTPQ", "type": "application/json" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } } }, "data": { "key": "TBX5VMDN", "version": 4, "parentItem": "GE3AZTPQ", "itemType": "attachment", "linkMode": "imported_url", "title": "ScienceDirect Snapshot", "accessDate": "2015-09-21T18:02:44Z", "url": "http://www.sciencedirect.com/science/article/pii/S0921509315303002", "note": "", "contentType": "text/html", "charset": "utf-8", "filename": "S0921509315303002.html", "md5": "22e249f9e558765dee0978f2a72452bf", "mtime": 1442858571000, "tags": [], "relations": {}, "dateAdded": "2015-09-21T18:02:44Z", "dateModified": "2015-09-21T18:02:44Z" } }, { "key": "WQ45IDDU", "version": 1, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/WQ45IDDU", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/WQ45IDDU", "type": "text/html" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "creatorSummary": "Karnesky et al.", "parsedDate": "2009", "numChildren": 0 }, "data": { "key": "WQ45IDDU", "version": 1, "itemType": "journalArticle", "title": "Evolution of Nanoscale Precipitates in Al Microalloyed with Sc and Er", "creators": [ { "creatorType": "author", "firstName": "Richard A.", "lastName": "Karnesky" }, { "creatorType": "author", "firstName": "David C.", "lastName": "Dunand" }, { "creatorType": "author", "firstName": "David N.", "lastName": "Seidman" } ], "abstractNote": "The coarsening kinetics of nanoscale, coherent Al₃(Sc₁₋[sub:x]Er[sub:x]) precipitates in α–Al during aging of a supersaturated Al–0.06 Sc–0.02 Er (at.%) alloy at 300 °C are studied using transmission electron microscopy and local-electrode atom-probe tomography. Erbium and Sc segregate at the precipitate core and shell, respectively. The matrix supersaturations of Er and Sc, as well as the mean precipitate radius and number density evolve in approximate agreement with coarsening models, allowing the determination of the matrix/precipitate interfacial free energy and solute diffusivities. At 300 °C, the α–Al/Al₃(Sc₁₋[sub:x]Er[sub:x]) interfacial free energy due to Sc is about twice as large as for α–Al/Al₃Sc. The diffusivity of Er in the ternary alloy is about three orders of magnitude smaller than that of Er in binary Al–0.045 at.% Er and about two orders of magnitude smaller than the diffusivity of Sc in binary Al–Sc. The measured Sc diffusivity is consistent with literature values.", "publicationTitle": "Acta Materialia", "publisher": "", "place": "", "date": "2009", "volume": "In Press", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Acta Mater.", "DOI": "", "citationKey": "", "url": "http://arc.nucapt.northwestern.edu/refbase/show.php?record=10599", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "1359-6454", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Al-Sc-Er", "type": 1 }, { "tag": "Aluminum alloys", "type": 1 }, { "tag": "Coarsening", "type": 1 }, { "tag": "Precipitation", "type": 1 }, { "tag": "Rare-Earth Elements", "type": 1 }, { "tag": "Scandium", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2009-05-17T15:27:53Z", "dateModified": "2009-05-17T15:27:53Z" } }, { "key": "9KKQRD37", "version": 1, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/9KKQRD37", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/9KKQRD37", "type": "text/html" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "creatorSummary": "van Dalen et al.", "parsedDate": "2009", "numChildren": 0 }, "data": { "key": "9KKQRD37", "version": 1, "itemType": "journalArticle", "title": "Erbium and Ytterbium Solubilities and Diffusivities in Aluminum as Determined by Nanoscale Characterization of Precipitates", "creators": [ { "creatorType": "author", "firstName": "Marsha E.", "lastName": "van Dalen" }, { "creatorType": "author", "firstName": "Richard A.", "lastName": "Karnesky" }, { "creatorType": "author", "firstName": "Josep R.", "lastName": "Cabotaje" }, { "creatorType": "author", "firstName": "David C.", "lastName": "Dunand" }, { "creatorType": "author", "firstName": "David N.", "lastName": "Seidman" } ], "abstractNote": "Binary aluminum alloys with 0.03-0.06 at.% RE (RE = Yb or Er) were aged to produce coherent, nanosize Al₃RE precipitates in an α-Al matrix. The temporal evolution of precipitate radii and matrix concentrations at 300 °C are measured by transmission electron microscopy and localelectrode atom-probe tomography, respectively. The temporal dependence of the matrix concentration of each RE is utilized to determine its solubility in Al. The solubility as well as the coarsening rate constants are used to determine the diffusivity of each RE in α-Al and the α-Al/Al₃RE interfacial free energies at 300 °C. When compared to Sc, both Yb and Er exhibit smaller solubilities but larger diffusivities in α-Al and larger α-Al/Al₃RE interfacial energies.", "publicationTitle": "Acta Materialia", "publisher": "", "place": "", "date": "2009", "volume": "In Press", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Acta Mater.", "DOI": "", "citationKey": "", "url": "http://arc.nucapt.northwestern.edu/refbase/show.php?record=10598", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "1359-6454", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Al-Er", "type": 1 }, { "tag": "Al-Yb", "type": 1 }, { "tag": "Aluminum alloys", "type": 1 }, { "tag": "Coarsening", "type": 1 }, { "tag": "Diffusion", "type": 1 }, { "tag": "Precipitation", "type": 1 }, { "tag": "Rare-Earth Elements", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2009-05-17T15:27:53Z", "dateModified": "2009-05-17T15:27:53Z" } }, { "key": "HXNXAHWX", "version": 1, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/HXNXAHWX", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/HXNXAHWX", "type": "text/html" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "creatorSummary": "Karnesky", "parsedDate": "2007", "numChildren": 0 }, "data": { "key": "HXNXAHWX", "version": 1, "itemType": "thesis", "title": "Mechanical Properties and Microstructure of Al–Sc with Rare-Earth Element or Al₂O₃ Additions", "creators": [ { "creatorType": "author", "firstName": "Richard A.", "lastName": "Karnesky" } ], "abstractNote": "Aluminum alloys strengthened with coherent (L1₂), nanosize Al₃Sc precipitates are structural materials that have outstanding strength at ambient and elevated temperatures. They are creep resistant at 300 °C and exhibit a threshold stress, below which creep is not measurable. Introducing ternary alloying additions, such as rare-earth elements (RE=Y, Dy, Er), that segregate within Al₃Sc precipitates improves this creep resistance by increasing the lattice parameter misfit of precipitates with Al. In this thesis, Al–600 Sc–200 RE and Al–900 Sc–300 Er (at. ppm) are studied. These elements are an order of magnitude less expensive than Sc, so reduce alloy costs. As an alternative or supplement to ternary additions, submicron (incoherent) Al₂O₃ dispersoids impart additional strengthening. The dispersion-strengthened cast alloys, DSC–Al–1100 Sc and DSC–Al–800 Sc–300 Zr, studied in this thesis contain 30 vol.% Al₂O₃.\n\nIn this thesis, the temporal evolution of Al–Sc–RE and DSC–Al–Sc(–Zr) alloys are measured using Local-Electrode Atom-Probe (LEAP) tomography, conventional transmission electron microscopy, and electrical conductivity. These techniques measure the changes in precipitate number density, size, volume fraction, chemical composition, and interprecipitate distance and are compared to models. They are also employed to measure the diffusivity and solid solubility of Er in Al in Al–300 Er, Al–450 Er, and Al–600 Er.\n\nThe mechanical behavior (microhardness, yield, and creep) of the alloys is studied at 25, 300, and 350 °C. The effect of Al₃(Sc₁₋[sub:x]Er[sub:x]) precipitate size and interprecipitate distance is studied by varying isochronal and isothermal aging treatments. Various models and simulations are compared to experimental data. At ambient temperatures, very small Al₃(Sc₁₋[sub:x]M[sub:x]) precipitates contribute to order strengthening and larger (unshearable) precipitates are bypassed by dislocations through Orowan bowing. Dislocation dynamics simulations allow both processes to operate in a glide plane, where precipitate distributions may be gathered directly or be informed by LEAP tomography data. At elevated temperatures, the lattice parameter and modulus mismatches of Al₃(Sc₁₋[sub:x]M[sub:x]) oppose both dislocation climb over Al₃(Sc₁₋[sub:x]M[sub:x]) and dislocation detachment from Al₂O₃.", "thesisType": "", "university": "Northwestern University", "place": "", "date": "2007", "series": "", "seriesNumber": "", "numPages": "", "DOI": "", "ISBN": "", "citationKey": "", "url": "http://arc.nucapt.northwestern.edu/refbase/show.php?record=10000", "accessDate": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2009-05-17T15:26:05Z", "dateModified": "2009-05-17T15:26:05Z" } }, { "key": "G9CZSKXV", "version": 1, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/G9CZSKXV", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/G9CZSKXV", "type": "text/html" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "creatorSummary": "Karnesky et al.", "parsedDate": "2007", "numChildren": 0 }, "data": { "key": "G9CZSKXV", "version": 1, "itemType": "journalArticle", "title": "Strengthening Mechanisms in Aluminum Containing Coherent Al₃Sc Precipitates and Incoherent Al₂O₃ Dispersoids", "creators": [ { "creatorType": "author", "firstName": "Richard A.", "lastName": "Karnesky" }, { "creatorType": "author", "firstName": "Liang", "lastName": "Meng" }, { "creatorType": "author", "firstName": "David C.", "lastName": "Dunand" } ], "abstractNote": "Dispersion-strengthened-cast aluminum (DSC-Al), consisting of a coarse-grained aluminum matrix containing two populations of particles (30 vol.% of 300 nm Al₂O₃ incoherent dispersoids and 0.2-0.3 vol.% of 6-60 nm coherent Al₃Sc precipitates), was studied. At ambient and elevated temperatures, both populations of particles contribute to strengthening. At 300 °C, creep threshold stresses are considerably higher than for control materials with a single population of either Al₂O₃ dispersoids or Al₃Sc precipitates. This synergistic effect is modeled by considering dislocations pinned at the departure side of incoherent Al₂O₃ dispersoids (detachment model) and simultaneously subjected to elastic interactions from neighboring coherent Al[sub:3Sc precipitates.", "publicationTitle": "Acta Materialia", "publisher": "", "place": "", "date": "2007", "volume": "55", "issue": "4", "section": "", "partNumber": "", "partTitle": "", "pages": "1299-1308", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Acta Mater.", "DOI": "10.1016/j.actamat.2006.10.004", "citationKey": "", "url": "http://arc.nucapt.northwestern.edu/refbase/show.php?record=1782", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "1359-6454", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Al-Sc", "type": 1 }, { "tag": "Aluminium Alloys", "type": 1 }, { "tag": "Creep", "type": 1 }, { "tag": "Metal Matrix Composites", "type": 1 }, { "tag": "Precipitation", "type": 1 }, { "tag": "Zirconium", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2009-05-17T15:24:53Z", "dateModified": "2009-05-17T15:24:53Z" } }, { "key": "M63VUP4C", "version": 1, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/M63VUP4C", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/M63VUP4C", "type": "text/html" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "creatorSummary": "Karnesky et al.", "parsedDate": "2006", "numChildren": 0 }, "data": { "key": "M63VUP4C", "version": 1, "itemType": "journalArticle", "title": "Creep of Al-Sc Microalloys with Rare-Earth Element Additions", "creators": [ { "creatorType": "author", "firstName": "Richard A.", "lastName": "Karnesky" }, { "creatorType": "author", "firstName": "David N.", "lastName": "Seidman" }, { "creatorType": "author", "firstName": "David C.", "lastName": "Dunand" } ], "abstractNote": "Cast and aged Al-Sc microalloys are creep-resistant to 300C, due to the blocking of dislocations by nanosize, coherent Al₃Sc (L1₂) precipitates. Rare-earth elements substitute for Sc in these precipitates, leading to a higher number density of smaller precipitates, which have a greater lattice-parameter mismatch with Al than in the Al-Sc binary microalloy. This leads\nto an improvement in both ambient temperature microhardness and high temperature creep. Creep threshold stresses of Al-Sc-RE (RE = Y, Dy, or Er) at 300C; are higher than for Al-Sc and Al-Sc-M (M = Mg, Ti, or Zr) microalloys. This is in agreement with a dislocation climb model that includes the elastic stress fields of the precipitates.", "publicationTitle": "Materials Science Forum", "publisher": "", "place": "", "date": "2006", "volume": "519-521", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "1035-1040", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Mater. Sci. Forum", "DOI": "", "citationKey": "", "url": "http://arc.nucapt.northwestern.edu/refbase/show.php?record=660", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0255-5476", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Al-Sc", "type": 1 }, { "tag": "Creep", "type": 1 }, { "tag": "Precipitation strengthening", "type": 1 }, { "tag": "Rare-Earth Elements", "type": 1 }, { "tag": "Scandium", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2009-05-17T15:24:41Z", "dateModified": "2009-05-17T15:24:41Z" } }, { "key": "6QSWASXX", "version": 1, "library": { "type": "group", "id": 14, "name": "Al-Sc", "links": { "alternate": { "href": "https://www.zotero.org/groups/al-sc", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/14/items/6QSWASXX", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/al-sc/items/6QSWASXX", "type": "text/html" } }, "meta": { "createdByUser": { "id": 24202, "username": "karnesky", "name": "Richard Karnesky", "links": { "alternate": { "href": "https://www.zotero.org/karnesky", "type": "text/html" } } }, "creatorSummary": "Karnesky et al.", "parsedDate": "2006", "numChildren": 0 }, "data": { "key": "6QSWASXX", "version": 1, "itemType": "journalArticle", "title": "Effects of Substituting Rare-Earth Elements for Scandium in a Precipitation-Strengthened Al 0.08 at.% Sc Alloy", "creators": [ { "creatorType": "author", "firstName": "Richard A.", "lastName": "Karnesky" }, { "creatorType": "author", "firstName": "Marsha E.", "lastName": "van Dalen" }, { "creatorType": "author", "firstName": "David C.", "lastName": "Dunand" }, { "creatorType": "author", "firstName": "David N.", "lastName": "Seidman" } ], "abstractNote": "The microhardness of Al-0.06 Sc-0.02 RE (at.%, with RE = Dy, Er, Gd, Sm, Y, or Yb) alloys is measured as a function of aging time at 300C. As compared to Al-0.08 Sc, the ternary alloys exhibit: (i) the same incubation time, except for Al-0.06 Sc-0.02 Yb which hardens much faster; (ii) the same or reduced peak microhardnesses (which are higher than for Al-0.06 Sc) and (iii) the same overaging behavior. All RE segregate to the core of Al₃(Sc₁₋[sub:x]RE[sub:x]) precipitates.", "publicationTitle": "Scripta Materialia", "publisher": "", "place": "", "date": "2006", "volume": "55", "issue": "5", "section": "", "partNumber": "", "partTitle": "", "pages": "437-440", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Scripta Mater.", "DOI": "10.1016/j.scriptamat.2006.05.021", "citationKey": "", "url": "http://arc.nucapt.northwestern.edu/refbase/show.php?record=779", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "1359-6462", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Al-Sc", "type": 1 }, { "tag": "Aluminum alloys", "type": 1 }, { "tag": "LEAP", "type": 1 }, { "tag": "Lanthanides", "type": 1 }, { "tag": "Local-Electrode Atom-Probe tomography", "type": 1 }, { "tag": "Precipitation strengthening", "type": 1 }, { "tag": "Rare-Earth Elements", "type": 1 }, { "tag": "Scandium", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2009-05-17T15:24:35Z", "dateModified": "2009-05-17T15:24:35Z" } } ]