DC Field | Value | Language |
---|---|---|
dc.contributor.author | Im, Hye Ji | ko |
dc.contributor.author | Choi, Won Seok | ko |
dc.contributor.author | Ryou, KenHee | ko |
dc.contributor.author | Seol, Jae Bok | ko |
dc.contributor.author | Kang, Tae Hyeok | ko |
dc.contributor.author | Ko, Won-Seok | ko |
dc.contributor.author | Choi, Pyuck-Pa | ko |
dc.date.accessioned | 2021-07-19T08:10:23Z | - |
dc.date.available | 2021-07-19T08:10:23Z | - |
dc.date.created | 2021-07-19 | - |
dc.date.created | 2021-07-19 | - |
dc.date.issued | 2021-08 | - |
dc.identifier.citation | ACTA MATERIALIA, v.214, no.1, pp.117011 | - |
dc.identifier.issn | 1359-6454 | - |
dc.identifier.uri | http://hdl.handle.net/10203/286748 | - |
dc.description.abstract | We studied the microstructural stability and high-temperature mechanical properties of gamma/gamma' Co-Ti-Mobased alloys of varying compositions (Co-12Ti-4Mo, Co-12Ti-4Mo-2Al, Co-12Ti-4Mo-4Al, Co-10Ti-4Mo2Al, and Co-8Ti-4Mo-4Al (at.%)) using electron microscopy and density functional theory. The Co-12Ti4Mo alloy underwent discontinuous precipitation into FCC (gamma) and D0(19) (chi) phases after aging at 800 degrees C for 500 h while the Co-12Ti-4Mo-4Al alloy maintained the gamma/gamma' microstructure. Al additions improved the stability of the gamma/gamma' microstructure by forming L2(1) (beta') precipitates along the grain boundaries, reducing the supersaturation of the gamma matrix and the FCC/L1(2) interface energy. The Co-1(2)Ti-4Mo-4Al alloy showed lower yield strength compared to the Al-free alloy, however, the difference in yield strength between these two alloys decreased with increasing temperature. This decrease is counterbalanced by a substantially enhanced specific yield strength at elevated temperatures as compared to other well-known Co-based alloys such as MarM302 and Co-9Al-9W. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Enhanced microstructural stability of gamma/gamma ' -strengthened Co-Ti-Mo-based alloys through Al additions | - |
dc.type | Article | - |
dc.identifier.wosid | 000670363900007 | - |
dc.identifier.scopusid | 2-s2.0-85107649161 | - |
dc.type.rims | ART | - |
dc.citation.volume | 214 | - |
dc.citation.issue | 1 | - |
dc.citation.beginningpage | 117011 | - |
dc.citation.publicationname | ACTA MATERIALIA | - |
dc.identifier.doi | 10.1016/j.actamat.2021.117011 | - |
dc.contributor.localauthor | Choi, Pyuck-Pa | - |
dc.contributor.nonIdAuthor | Seol, Jae Bok | - |
dc.contributor.nonIdAuthor | Kang, Tae Hyeok | - |
dc.contributor.nonIdAuthor | Ko, Won-Seok | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Cobalt-based superalloys | - |
dc.subject.keywordAuthor | Microstructural stability | - |
dc.subject.keywordAuthor | Interface energy | - |
dc.subject.keywordAuthor | Mechanical properties | - |
dc.subject.keywordAuthor | Density functional theory calculations | - |
dc.subject.keywordPlus | TOTAL-ENERGY CALCULATIONS | - |
dc.subject.keywordPlus | MECHANICAL-PROPERTIES | - |
dc.subject.keywordPlus | PHASE-EQUILIBRIA | - |
dc.subject.keywordPlus | DISLOCATION CORES | - |
dc.subject.keywordPlus | LATTICE MISFIT | - |
dc.subject.keywordPlus | FAULT ENERGIES | - |
dc.subject.keywordPlus | CREEP-BEHAVIOR | - |
dc.subject.keywordPlus | GAMMA&apos | - |
dc.subject.keywordPlus | null | - |
dc.subject.keywordPlus | SUPERALLOYS | - |
dc.subject.keywordPlus | TA | - |
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