Elastic moduli and thermal expansion coefficients of medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy
Elastic moduli and thermal expansion coefficients of medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy
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DOI：
10.1016/j.jallcom.2018.02.251
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发表时间：
2018-05-25
影响因子：
6.2
通讯作者：
George, E. P.
中科院分区：
文献类型：
--
作者：
Laplanche, G.;Gadaud, P.;George, E. P.
在293 K ~ 1000 K范围内，测定了CrMnFeCoNi高熵合金的中熵子系统CrFeCoNi、CrCoNi、CrFeNi、FeCoNi、MnCoNi、MnFeNi和CoNi等原子合金的弹性模量随温度的变化。测定了这些合金在100 K-673 K温度范围内的热膨胀系数。所有合金都是单相的，并且具有面心立方（FCC）晶体结构，除了CrFeNi是在FCC基体中含有少量体心立方（BCC）沉淀物的两相合金。这里获得的热膨胀系数和弹性模量的温度依赖性是有用的，用于量化的基本方面，如固溶体强化，和结构分析/设计。利用上述结果，文献中报道的这些合金的屈服强度由它们的剪切模量归一化，以揭示剪切模量对固溶强化的影响。(c)2018作者（S）由爱思唯尔公司出版
Elastic moduli of a set of equiatomic alloys (CrFeCoNi, CrCoNi, CrFeNi, FeCoNi, MnCoNi, MnFeNi, and CoNi), which are medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy were determined as a function of temperature over the range 293 K-1000 K. Thermal expansion coefficients were determined for these alloys over the temperature range 100 K-673 K. All alloys were single-phase and had the face-centered cubic (FCC) crystal structure, except CrFeNi which is a two-phase alloy containing a small amount of body-centered cubic (BCC) precipitates in a FCC matrix. The temperature dependences of thermal expansion coefficients and elastic moduli obtained here are useful for quantifying fundamental aspects such as solid solution strengthening, and for structural analysis/design. Using the above results, the yield strengths reported in literature for these alloys were normalized by their shear moduli to reveal the influence of shear modulus on solid solution strengthening. (c) 2018 The Author(s). Published by Elsevier B.V.