Development of Co-Cr-Mo-Fe-Mn-W and Co-Cr-Mo-Fe-Mn-W-Ag high-entropy alloys based on Co-Cr-Mo alloys

Nagase, Takeshi; Todai, Mitsuharu; Nakano, Takayoshi

Materials Transactions, 2020, 61(4), 567-576

Number of Access:371（2025-08-21 04:36 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/89895

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Title
Development of Co-Cr-Mo-Fe-Mn-W and Co-Cr-Mo-Fe-Mn-W-Ag high-entropy alloys based on Co-Cr-Mo alloys
Creator
NRID
1000050362661 1000050362661
CreatorName
Nagase, Takeshi
NRID
1000010610800 1000010610800
CreatorName
Todai, Mitsuharu
NRID
1000030243182 1000030243182
ORCID
0000-0001-8052-1698 0000-0001-8052-1698
researchmap permalink
read0013987 read0013987
Scopus Author ID
7403896013 7403896013
CreatorName
Nakano, Takayoshi
Subject
Alloy design
High-entropy alloys
Intermetallic compounds
Description
Nagase T., Todai M., Nakano T. Development of Co-Cr-Mo-Fe-Mn-W and Co-Cr-Mo-Fe-Mn-W-Ag high-entropy alloys based on Co-Cr-Mo alloys. Materials Transactions 61, 567 (2020); https://doi.org/10.2320/matertrans.MT-MK2019002.
Abstract
Co-Cr and Co-Cr-Mo-based alloys are commercially used in the industry especially for high wear resistance and superior chemical and corrosion performance in hostile environments. These alloys were widely recognized as the important metallic biomaterials. Here, the first development of Co-Cr-Mo-Fe-Mn-W and Co-Cr-Mo-Fe-Mn-W-Ag high-entropy alloys (HEAs) based on Co-Cr-Mo metallic biomaterials is reported. Ingots of six-component Co₂.₆Cr₁.₂Mo₀.₂FeMnW₀.₂₇ (Co₄₁.₅Cr₁₉.₁Mo₃.₂Fe₁₆Mn₁₆W₄.₃, at%) HEAs with a minor σ phase and of seven-component Co₄.₂₂₅Cr₁.₉₅Mo₀.₂FeMnW₀.₂Ag₀.₅ (Co₄₆.₆Cr₂₁.₅Mo₂.₂Fe₁₁Mn₁₁W₂.₂Ag₅.₅, at%) and Co₂.₆Cr₁.₂Mo₀.₁FeMnW₀.₁Ag₀.₁₈ (Co₄₂.₁Cr₁₉.₄Mo₁.₆Fe₁₆.₂Mn₁₆.₂W₁.₆Ag₂.₉, at%) HEAs without an · phase were fabricated. The alloy was designed by a taxonomy of HEAs based on the periodic table, a treelike diagram, predicted phase diagrams constructed by Materials Project, and empirical alloy parameters for HEAs. The · phase formation prevented the formation of solid solutions in Co-Cr-Mo-based HEAs without a Ni element. The · phase formation in as-cast ingots was discussed based on the composition dependence and valence electron concentration theory.
Publisher
The Japan Institute of Metals and Materials
Source Title
Materials Transactions
Volume (Issue)
61(4)
Page
567-576
Date of Issued
2020-04-01
Language
English
Handle URL
https://hdl.handle.net/11094/89895
PISSN
13459678
eISSN
13475320
NCID
AA1151294X
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.2320/matertrans.MT-MK2019002
Access Rights
open access
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article