学術雑誌論文

学術雑誌論文

text

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

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

The Japan Institute of Metals and Materials

英語

text

2020-04-01

https://doi.org/10.2320/matertrans.MT-MK2019002

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.

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.

89895

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

The Japan Institute of Metals and Materials

英語

2020-04-01

Materials Transactions

61

4

567

576

https://doi.org/10.2320/matertrans.MT-MK2019002

https://hdl.handle.net/11094/89895