Lattice distortion and magnetic property of high entropy alloys at low temperatures

Yuan-Yuan Tan ¹Zhong-Jun Chen ²Ming-Yao Su ³Gan Ding ¹Min-Qiang Jiang ³Zhou-Can Xie ³Yu Gong ²Tao Wu ⁴Zhong-Hua Wu ²Hai-Ying Wang ³Lan-Hong Dai⁵

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作者信息

1. State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China
2. Institute of High Energy Physics,Chinese Academy of Sciences&Graduate,University of Chinese Academy of Sciences,Beijing 100049,China
3. State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China;School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China
4. Zhejiang Institute of Mechanical&Electrical Engineering,Hangzhou 310053,China
5. State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China;School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China;Zhejiang Institute of Mechanical&Electrical Engineering,Hangzhou 310053,China
折叠

Abstract

Deformation mechanisms and magnetic properties of medium and high entropy alloys(MEA/HEAs)closely relate to lattice distortion and are strongly temperature-dependent,in particular,at low temper-ature ranges.However,little attention has been paid to the evolution of lattice distortion with tempera-ture decreasing and its effects on deformation behavior and magnetic state transition.In this work,we carry out in situ synchrotron radiation based X-ray powder diffraction(SR-XRD)experiments from 293 to 123 K aiming for determining lattice distortion evolutions of CrCoNi MEA,CrFeCoNi and CrMnFeCoNi HEAs.Magnetic measurements at corresponding low temperatures and cryogenic ranges are further con-ducted.The in situ SR-XRD results demonstrate a general reduction of lattice distortion magnitude with temperature decreasing,which shows a similar tendency with that of reported stacking fault energy(SFE)values.It is thus suggested that lattice distortion reduction possibly makes a critical contribution to defor-mation mechanism transition.The magnetic measurement results show a clear ferromagnetic transition of CrFeCoNi HEA when temperature is below 173 K.While,no obvious magnetic state transition is ob-served for CrCoNi MEA and CrMnFeCoNi HEA.The present findings on lattice distortion evolutions will pave the way for designing targeted HEAs with particular properties.

Key words

High entropy alloy/Lattice distortion/Magnetic property/Low temperature/In situ SR-XRD

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基金项目

National Key Research and Development Program of China(2017YFB0702003)

Na-tional Science Foundation of China(12002341)

Na-tional Science Foundation of China(11790292)

Na-tional Science Foundation of China(11672316)

NSFC Basic Science Center Program forMultiscale Problems in Nonlinear Mechanics(11988102)

Strategic Priority Research Program(XDB22040302)

Strategic Priority Research Program(XDB22040303)

Key Research Program of Frontier Sciences(QYZDJSSW-JSC011)

Science Challenge Project(TZ2016001)

Zhe-jiang Provincial Natural Science Foundation(LGG21E010005)

出版年

2022

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量68

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