Monocrystalline elastic constants and their temperature dependences for equi-atomic Cr-Mn-Fe-Co-Ni high-entropy alloy with the face-centered cubic structure

被引：25
作者：
Teramoto, Takeshi [1 ]
Yamada, Kazuki [1 ]
Ito, Ryo [1 ]
Tanaka, Katsushi [1 ]
机构：
[1] Kobe Univ, Dept Mech Engn, Nada Ku, 1-1 Rokkodai Cho, Kobe, Hyogo 6578501, Japan
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 777卷
关键词：
Transition metal alloys and compounds; Elasticity; Ultrasonics; STACKING-FAULT ENERGIES; MECHANICAL-PROPERTIES; MICROSTRUCTURE; CRMNFECONI; STABILITY; MODULI; EVOLUTION; CRYSTALS; STRESS;
D O I：
10.1016/j.jallcom.2018.11.052
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：
The temperature dependences of monocrystalline elastic constants of Cr-Mn-Fe-Co-Ni high entropy alloy with the face-centered cubic (fcc) structure have been experimentally determined using resonance ultrasound spectroscopy from liquid helium temperature to 1173 K. The values of three independent monocrystalline and estimated polycrystalline elastic constants are fitted using the Varshni equation so that one can obtain the values at any temperatures. The elastic anisotropy of the alloy is characterized by a relatively large value of anisotropy factor of shear modulus, which is closely related to a small value of stacking fault energy of this alloy. The monocrystalline elastic constants also indicate that a relatively strong directional interatomic bonding exists in the present high-entropy alloy. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：1313 / 1318
页数：6
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