Enhanced microstructural stability of gamma/gamma ' -strengthened Co-Ti-Mo-based alloys through Al additions

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 58
  • Download : 0
DC FieldValueLanguage
dc.contributor.authorIm, Hye Jiko
dc.contributor.authorChoi, Won Seokko
dc.contributor.authorRyou, KenHeeko
dc.contributor.authorSeol, Jae Bokko
dc.contributor.authorKang, Tae Hyeokko
dc.contributor.authorKo, Won-Seokko
dc.contributor.authorChoi, Pyuck-Pako
dc.date.accessioned2021-07-19T08:10:23Z-
dc.date.available2021-07-19T08:10:23Z-
dc.date.created2021-07-19-
dc.date.issued2021-08-
dc.identifier.citationACTA MATERIALIA, v.214-
dc.identifier.issn1359-6454-
dc.identifier.urihttp://hdl.handle.net/10203/286748-
dc.description.abstractWe 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.languageEnglish-
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD-
dc.titleEnhanced microstructural stability of gamma/gamma ' -strengthened Co-Ti-Mo-based alloys through Al additions-
dc.typeArticle-
dc.identifier.wosid000670363900007-
dc.identifier.scopusid2-s2.0-85107649161-
dc.type.rimsART-
dc.citation.volume214-
dc.citation.publicationnameACTA MATERIALIA-
dc.identifier.doi10.1016/j.actamat.2021.117011-
dc.contributor.localauthorChoi, Pyuck-Pa-
dc.contributor.nonIdAuthorSeol, Jae Bok-
dc.contributor.nonIdAuthorKang, Tae Hyeok-
dc.contributor.nonIdAuthorKo, Won-Seok-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorCobalt-based superalloys-
dc.subject.keywordAuthorMicrostructural stability-
dc.subject.keywordAuthorInterface energy-
dc.subject.keywordAuthorMechanical properties-
dc.subject.keywordAuthorDensity functional theory calculations-
dc.subject.keywordPlusTOTAL-ENERGY CALCULATIONS-
dc.subject.keywordPlusMECHANICAL-PROPERTIES-
dc.subject.keywordPlusPHASE-EQUILIBRIA-
dc.subject.keywordPlusDISLOCATION CORES-
dc.subject.keywordPlusLATTICE MISFIT-
dc.subject.keywordPlusFAULT ENERGIES-
dc.subject.keywordPlusCREEP-BEHAVIOR-
dc.subject.keywordPlusGAMMA&apos-
dc.subject.keywordPlusnull-
dc.subject.keywordPlusSUPERALLOYS-
dc.subject.keywordPlusTA-
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0