材料科学
价电子
原子半径
高熵合金
立方晶系
价(化学)
热力学
相界
结晶学
冶金
相(物质)
电子
微观结构
物理
化学
量子力学
作者
Kodai Niitsu,Makoto Asakura,Koretaka Yuge,Haruyuki Inui
出处
期刊:Materials transactions
[The Japan Institute of Metals]
日期:2020-09-01
卷期号:61 (9): 1874-1880
被引量:13
标识
DOI:10.2320/matertrans.mt-m2020144
摘要
We have investigated the face-centered cubic (FCC) single-phase formability of non-equiatomic Cr–Mn–Fe–Co–Ni HEAs as well as equiatomic derivative medium/high-entropy alloys (M/HEAs) considering their valence electron concentration (VEC) and mean-square atomic displacement (MSAD). While VEC remains the most decisive parameter to predict phase formation, MSAD can be a complementary parameter that modifies the VEC boundary. Multiplicity of constituent elements was beneficial to accommodate a larger MSAD, which resulted in a downward shift of the VEC boundary for the FCC single phase. This offers information about the correlations between the phase formation preference, VEC, and MSAD of M/HEAs with various compositions.
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