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

Number of Access:1,233（2025-08-14 05:09 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/98587

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Title
Stress increase by nanoscale hcp precipitates in HfNbTaTiZr high entropy alloys
Creator
NRID
1000060294021 1000060294021
ORCID
0000-0002-7077-0655 0000-0002-7077-0655
researchmap permalink
read0051691 read0051691
Scopus Author ID
47861549600 47861549600
CreatorName
Yasuda, Hiroyuki Y.
CreatorName
Yamada, Yusuke
CreatorName
Onishi, Masato
CreatorName
Suzuki, Hiroki
NRID
1000000633661 1000000633661
researchmap permalink
choken choken
Scopus Author ID
55535308400 55535308400
CreatorName
Cho, Ken
NRID
1000080403137 1000080403137
ORCID
0000-0003-3597-1045 0000-0003-3597-1045
researchmap permalink
satoshiichikawa satoshiichikawa
Scopus Author ID
36055779800 36055779800
CreatorName
Ichikawa, Satoshi
NRID
1000050362661 1000050362661
CreatorName
Nagase, Takeshi
Subject
High entropy alloys
Phase transformation
Plastic deformation
Refractory metals
Spinodal decomposition
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.
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.
Publisher
Elsevier B.V.
Source Title
Scripta Materialia
Volume (Issue)
255
Page
116401
Date of Issued
2025-01-15
Language
English
Handle URL
https://hdl.handle.net/11094/98587
PISSN
13596462
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.scriptamat.2024.116401
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version
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Category
学術雑誌論文 Journal Article