Tungsten solubility in L12-ordered Al3Er and Al3Zr nanoprecipitates formed by aging in an aluminum matrix
The partitioning behavior of tungsten is studied in two dilute Al-Er-W and Al-Zr-W alloys aged isochronally up to 400 and 475 °C, to form L12-structured Al3Er and Al3Zr nanoprecipitates. Atom-probe tomography reveals low W solubility in the Al3Er and Al3Zr nanoprecipitates (0.071 and 0.234 at.%, res...
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| Veröffentlicht in: | Journal of alloys and compounds 2020-04, Vol.820, p.153383, Article 153383 |
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| creator | Farkoosh, Amir R. Dunand, David C. Seidman, David N. |
| description | The partitioning behavior of tungsten is studied in two dilute Al-Er-W and Al-Zr-W alloys aged isochronally up to 400 and 475 °C, to form L12-structured Al3Er and Al3Zr nanoprecipitates. Atom-probe tomography reveals low W solubility in the Al3Er and Al3Zr nanoprecipitates (0.071 and 0.234 at.%, respectively) and very low W solubility in the Al matrix (0.057 and 0.023 at.%, respectively), corresponding to precipitate/matrix partitioning ratios of ∼1–10. First-principles calculations demonstrate that the formation energies of substitutional W atoms in the L12 lattices are high and positive (0.66–1.73 eV.atom−1), consistent with the small W solubilities measured experimentally in these nanoprecipitates.
•L12-nanoprecipitates formed upon aging the dilute Al-Zr-W and Al-Er-W alloys.•A limited solubility of W in the L12-phase was observed experimentally.•W prefers strongly to occupy the Al sublattice sites of L12-Al3Zr.•W weakly prefers to substitute at the Er sublattice sites of L12-Al3Er.•These substitutions are associated with large and positive formation energies. |
| doi_str_mv | 10.1016/j.jallcom.2019.153383 |
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•L12-nanoprecipitates formed upon aging the dilute Al-Zr-W and Al-Er-W alloys.•A limited solubility of W in the L12-phase was observed experimentally.•W prefers strongly to occupy the Al sublattice sites of L12-Al3Zr.•W weakly prefers to substitute at the Er sublattice sites of L12-Al3Er.•These substitutions are associated with large and positive formation energies.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2019.153383</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Aluminum alloys ; Atom-probe tomography ; First principles ; Free energy ; Heat of formation ; Lattices ; Matrix partitioning ; Partitioning ; Scandium ; Solubility ; Tungsten ; Zirconium</subject><ispartof>Journal of alloys and compounds, 2020-04, Vol.820, p.153383, Article 153383</ispartof><rights>2019 Elsevier B.V.</rights><rights>Copyright Elsevier BV Apr 15, 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2993-207d213297fcde532ba1abfe0e6c8ed40bbd659f4e6997257bc991227c4c2cbe3</citedby><cites>FETCH-LOGICAL-c2993-207d213297fcde532ba1abfe0e6c8ed40bbd659f4e6997257bc991227c4c2cbe3</cites><orcidid>0000-0001-6210-6255</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jallcom.2019.153383$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27923,27924,45994</link.rule.ids></links><search><creatorcontrib>Farkoosh, Amir R.</creatorcontrib><creatorcontrib>Dunand, David C.</creatorcontrib><creatorcontrib>Seidman, David N.</creatorcontrib><title>Tungsten solubility in L12-ordered Al3Er and Al3Zr nanoprecipitates formed by aging in an aluminum matrix</title><title>Journal of alloys and compounds</title><description>The partitioning behavior of tungsten is studied in two dilute Al-Er-W and Al-Zr-W alloys aged isochronally up to 400 and 475 °C, to form L12-structured Al3Er and Al3Zr nanoprecipitates. Atom-probe tomography reveals low W solubility in the Al3Er and Al3Zr nanoprecipitates (0.071 and 0.234 at.%, respectively) and very low W solubility in the Al matrix (0.057 and 0.023 at.%, respectively), corresponding to precipitate/matrix partitioning ratios of ∼1–10. First-principles calculations demonstrate that the formation energies of substitutional W atoms in the L12 lattices are high and positive (0.66–1.73 eV.atom−1), consistent with the small W solubilities measured experimentally in these nanoprecipitates.
•L12-nanoprecipitates formed upon aging the dilute Al-Zr-W and Al-Er-W alloys.•A limited solubility of W in the L12-phase was observed experimentally.•W prefers strongly to occupy the Al sublattice sites of L12-Al3Zr.•W weakly prefers to substitute at the Er sublattice sites of L12-Al3Er.•These substitutions are associated with large and positive formation energies.</description><subject>Aluminum alloys</subject><subject>Atom-probe tomography</subject><subject>First principles</subject><subject>Free energy</subject><subject>Heat of formation</subject><subject>Lattices</subject><subject>Matrix partitioning</subject><subject>Partitioning</subject><subject>Scandium</subject><subject>Solubility</subject><subject>Tungsten</subject><subject>Zirconium</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LxDAQhoMouK7-BCHguTUf_UhOsizrByx4WS9eQppOl5Q2WZNW3H9v1-5dGJg5PO8M8yB0T0lKCS0e27TVXWd8nzJCZUpzzgW_QAsqSp5kRSEv0YJIlieCC3GNbmJsCZlIThfI7ka3jwM4HH03VrazwxFbh7eUJT7UEKDGq45vAtbub_oM2GnnDwGMPdhBDxBx40M_cdUR6711-1NeT9WNvXVjj3s9BPtzi64a3UW4O_cl-nje7Navyfb95W292iaGSckTRsqaUc5k2Zgacs4qTXXVAIHCCKgzUlV1kcsmg0LKkuVlZaSkjJUmM8xUwJfoYd57CP5rhDio1o_BTScV43nGKSFCTFQ-Uyb4GAM06hBsr8NRUaJOVlWrzlbVyaqarU65pzkH0wvfFoKKxoIzUNvJyKBqb__Z8AsyO4NU</recordid><startdate>20200415</startdate><enddate>20200415</enddate><creator>Farkoosh, Amir R.</creator><creator>Dunand, David C.</creator><creator>Seidman, David N.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><orcidid>https://orcid.org/0000-0001-6210-6255</orcidid></search><sort><creationdate>20200415</creationdate><title>Tungsten solubility in L12-ordered Al3Er and Al3Zr nanoprecipitates formed by aging in an aluminum matrix</title><author>Farkoosh, Amir R. ; Dunand, David C. ; Seidman, David N.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2993-207d213297fcde532ba1abfe0e6c8ed40bbd659f4e6997257bc991227c4c2cbe3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Aluminum alloys</topic><topic>Atom-probe tomography</topic><topic>First principles</topic><topic>Free energy</topic><topic>Heat of formation</topic><topic>Lattices</topic><topic>Matrix partitioning</topic><topic>Partitioning</topic><topic>Scandium</topic><topic>Solubility</topic><topic>Tungsten</topic><topic>Zirconium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Farkoosh, Amir R.</creatorcontrib><creatorcontrib>Dunand, David C.</creatorcontrib><creatorcontrib>Seidman, David N.</creatorcontrib><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Farkoosh, Amir R.</au><au>Dunand, David C.</au><au>Seidman, David N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Tungsten solubility in L12-ordered Al3Er and Al3Zr nanoprecipitates formed by aging in an aluminum matrix</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2020-04-15</date><risdate>2020</risdate><volume>820</volume><spage>153383</spage><pages>153383-</pages><artnum>153383</artnum><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>The partitioning behavior of tungsten is studied in two dilute Al-Er-W and Al-Zr-W alloys aged isochronally up to 400 and 475 °C, to form L12-structured Al3Er and Al3Zr nanoprecipitates. Atom-probe tomography reveals low W solubility in the Al3Er and Al3Zr nanoprecipitates (0.071 and 0.234 at.%, respectively) and very low W solubility in the Al matrix (0.057 and 0.023 at.%, respectively), corresponding to precipitate/matrix partitioning ratios of ∼1–10. First-principles calculations demonstrate that the formation energies of substitutional W atoms in the L12 lattices are high and positive (0.66–1.73 eV.atom−1), consistent with the small W solubilities measured experimentally in these nanoprecipitates.
•L12-nanoprecipitates formed upon aging the dilute Al-Zr-W and Al-Er-W alloys.•A limited solubility of W in the L12-phase was observed experimentally.•W prefers strongly to occupy the Al sublattice sites of L12-Al3Zr.•W weakly prefers to substitute at the Er sublattice sites of L12-Al3Er.•These substitutions are associated with large and positive formation energies.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2019.153383</doi><orcidid>https://orcid.org/0000-0001-6210-6255</orcidid><oa>free_for_read</oa></addata></record> |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Aluminum alloys Atom-probe tomography First principles Free energy Heat of formation Lattices Matrix partitioning Partitioning Scandium Solubility Tungsten Zirconium |
| title | Tungsten solubility in L12-ordered Al3Er and Al3Zr nanoprecipitates formed by aging in an aluminum matrix |
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