Polycrystalline elastic moduli of a high-entropy alloy at cryogenic temperatures

被引：155

作者：

Haglund, A. ^{[1
]}

Koehler, M. ^{[1
]}

Catoor, D. ^{[2
]}

George, E. P. ^{[1
,2
]}

Keppens, V. ^{[1
]}

机构：

[1] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

来源：

INTERMETALLICS | 2015年 / 58卷

关键词：

High-entropy alloys; Elastic properties; PHASE-STABILITY; MICROSTRUCTURE; ELEMENTS;

D O I：

10.1016/j.intermet.2014.11.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

CrMnCoFeNi is a FCC high-entropy alloy (HEA) that exhibits strong temperature dependence of strength at low homologous temperatures in sharp contrast to pure FCC metals like Ni that show weak temperature dependence. To understand this behavior, elastic constants were determined as a function of temperature. From 300 K down to 55 K, the shear modulus (G) of the HEA changes by only 8%, increasing from 80 to 86 GPa. This temperature dependence is weaker than that of FCC Ni, whose G increases by 12% (81-91 GPa). Therefore, the uncharacteristic temperature-dependence of the strength of the HEA is not due to the temperature dependence of its shear modulus. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：62 / 64

页数：3

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