Stress increase by nanoscale hcp precipitates in HfNbTaTiZr high entropy alloys

Yasuda, Hiroyuki Y.; Yamada, Yusuke; Onishi, Masato; Suzuki, Hiroki; Cho, Ken; Ichikawa, Satoshi; Nagase, Takeshi

doi:https://doi.org/10.1016/j.scriptamat.2024.116401

Stress increase by nanoscale hcp precipitates in HfNbTaTiZr high entropy alloys

Yasuda, Hiroyuki Y.; Yamada, Yusuke; Onishi, Masato et al.

Scripta Materialia, 2025, 255, 116401

アクセス数:1,198件（2025-07-27 07:31 集計）

固定URL: https://hdl.handle.net/11094/98587

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タイトル	Stress increase by nanoscale hcp precipitates in HfNbTaTiZr high entropy alloys
著者	NRID 1000060294021 1000060294021 ORCID 0000-0002-7077-0655 0000-0002-7077-0655 researchmap permalink read0051691 read0051691 Scopus Author ID 47861549600 47861549600 著者名 Yasuda, Hiroyuki Y.
	著者名 Yamada, Yusuke
	著者名 Onishi, Masato
	著者名 Suzuki, Hiroki
	NRID 1000000633661 1000000633661 researchmap permalink choken choken Scopus Author ID 55535308400 55535308400 著者名 Cho, Ken
	NRID 1000080403137 1000080403137 ORCID 0000-0003-3597-1045 0000-0003-3597-1045 researchmap permalink satoshiichikawa satoshiichikawa Scopus Author ID 36055779800 36055779800 著者名 Ichikawa, Satoshi
	NRID 1000050362661 1000050362661 著者名 Nagase, Takeshi
キーワード等	High entropy alloys
	Phase transformation
	Plastic deformation
	Refractory metals
	Spinodal decomposition
内容	Yasuda H.Y., Yamada Y., Onishi M., et al. Stress increase by nanoscale hcp precipitates in HfNbTaTiZr high entropy alloys. Scripta Materialia 255, 116401 (2025); https://doi.org/10.1016/j.scriptamat.2024.116401.
抄録	HfNbTaTiZr high entropy alloys show a stress increase around 873 K, especially in the single crystals. At 873 K, the bcc single phase is decomposed into the bcc1 and bcc2 phases due to spinodal decomposition with composition modulation along 〈100〉 direction. The bcc1 phase has Zr- and Hf-rich composition, while Nb and Ta are enriched in the bcc2 phase. Next, the hcp phase is precipitated along the bcc1 phase. As a result, the hcp phase is aligned parallel to {100} plane of the bcc phase. The fine hcp phase acts as a strong barrier to the dislocation motion, resulting in the stress increase at 873 K.
出版者	Elsevier B.V.
収録物名	Scripta Materialia
巻(号)	255
ページ	116401
刊行年月	2025-01-15
言語	英語
ハンドルURL	https://hdl.handle.net/11094/98587
PISSN	13596462
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.scriptamat.2024.116401
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCTERMS.bibliographicCitation	Scripta Materialia. 2025, 255, p. 116401
DC.title	Stress increase by nanoscale hcp precipitates in HfNbTaTiZr high entropy alloys
DC.creator	Yasuda, Hiroyuki Y.
	Yamada, Yusuke
	Onishi, Masato
	Suzuki, Hiroki
	Cho, Ken
	Ichikawa, Satoshi
	Nagase, Takeshi
DC.publisher	Elsevier B.V.
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2025-01-15
DC.identifier	https://doi.org/10.1016/j.scriptamat.2024.116401
DC.subject	High entropy alloys
	Phase transformation
	Plastic deformation
	Refractory metals
	Spinodal decomposition
DC.description	Yasuda H.Y., Yamada Y., Onishi M., et al. Stress increase by nanoscale hcp precipitates in HfNbTaTiZr high entropy alloys. Scripta Materialia 255, 116401 (2025); https://doi.org/10.1016/j.scriptamat.2024.116401.
DCTERMS.abstract	HfNbTaTiZr high entropy alloys show a stress increase around 873 K, especially in the single crystals. At 873 K, the bcc single phase is decomposed into the bcc1 and bcc2 phases due to spinodal decomposition with composition modulation along 〈100〉 direction. The bcc1 phase has Zr- and Hf-rich composition, while Nb and Ta are enriched in the bcc2 phase. Next, the hcp phase is precipitated along the bcc1 phase. As a result, the hcp phase is aligned parallel to {100} plane of the bcc phase. The fine hcp phase acts as a strong barrier to the dislocation motion, resulting in the stress increase at 873 K.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	98587
citation_title	Stress increase by nanoscale hcp precipitates in HfNbTaTiZr high entropy alloys
citation_author	Yasuda, Hiroyuki Y.
	Yamada, Yusuke
	Onishi, Masato
	Suzuki, Hiroki
	Cho, Ken
	Ichikawa, Satoshi
	Nagase, Takeshi
citation_publisher	Elsevier B.V.
citation_language	英語
citation_date	2025-01-15
citation_journal_title	Scripta Materialia
citation_volume	255
citation_firstpage	116401
citation_doi	https://doi.org/10.1016/j.scriptamat.2024.116401
citation_public_url	https://hdl.handle.net/11094/98587

Stress increase by nanoscale hcp precipitates in HfNbTaTiZr high entropy alloys

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