FCC to BCC transformation-induced plasticity based on thermodynamic phase stability in novel V10Cr10Fe45CoxNi35-x medium-entropy alloys
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 손석수 | - |
dc.date.accessioned | 2022-04-09T00:41:07Z | - |
dc.date.available | 2022-04-09T00:41:07Z | - |
dc.date.created | 2022-04-08 | - |
dc.date.issued | 2019-02 | - |
dc.identifier.issn | 20452322 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/139699 | - |
dc.description.abstract | We introduce a novel transformation-induced plasticity mechanism, i.e., a martensitic transformation from fcc phase to bcc phase, in medium-entropy alloys (MEAs). A VCrFeCoNi MEA system is designed by thermodynamic calculations in consideration of phase stability between bcc and fcc phases. The resultantly formed bcc martensite favorably contributes to the transformation-induced plasticity, thereby leading to a significant enhancement in both strength and ductility as well as strain hardening. We reveal the microstructural evolutions according to the Co-Ni balance and their contributions to a mechanical response. The Co-Ni balance plays a leading role in phase stability and consequently tunes the cryogenic-temperature strength-ductility balance. The main difference from recently-reported metastable high-entropy dual-phase alloys is the formation of bcc martensite as a daughter phase, which shows significant effects on strain hardening. The hcp phase in the present MEA mostly acts as a nucleation site for the bcc martensite. Our findings demonstrate that the fcc to bcc transformation can be an attractive route to a new MEA design strategy for improving cryogenic strength-ductility. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | NATURE PUBLISHING GROUP | - |
dc.title | FCC to BCC transformation-induced plasticity based on thermodynamic phase stability in novel V10Cr10Fe45CoxNi35-x medium-entropy alloys | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | 손석수 | - |
dc.identifier.doi | 10.1038/s41598-019-39570-y | - |
dc.identifier.wosid | 000459799800097 | - |
dc.identifier.bibliographicCitation | SCIENTIFIC REPORTS, v.9 | - |
dc.relation.isPartOf | SCIENTIFIC REPORTS | - |
dc.citation.title | SCIENTIFIC REPORTS | - |
dc.citation.volume | 9 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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