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

作     者：Yuan-Yuan Tan Zhong-Jun Chen Ming-Yao Su Gan Ding Min-Qiang Jiang Zhou-Can Xie Yu Gong Tao Wu Zhong-Hua Wu Hai-Ying Wang Lan-Hong Dai Yuan-Yuan Tan;Zhong-Jun Chen;Ming-Yao Su;Gan Ding;Min-Qiang Jiang;Zhou-Can Xie;Yu Gong;Tao Wu;Zhong-Hua Wu;Hai-Ying Wang;Lan-Hong Dai

作者机构：State Key Laboratory of Nonlinear MechanicsInstitute of MechanicsChinese Academy of SciencesBeijing 100190China Institute of High Energy PhysicsChinese Academy of Sciences&GraduateUniversity of Chinese Academy of SciencesBeijing 100049China School of Engineering ScienceUniversity of Chinese Academy of SciencesBeijing 100049China Zhejiang Institute of Mechanical&Electrical EngineeringHangzhou 310053China State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing 100081China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第104卷第9期

页      面：236-243页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Key Research and Development Program of China(No.2017YFB0702003) the National Science Foundation of China(Nos.12002341,11790292 and 11672316) the NSFC Basic Science Center Program for“Multiscale Problems in Nonlinear Mechanics”(No.11988102) the Strategic Priority Research Program(Nos.XDB22040302 and XDB22040303) the Key Research Program of Frontier Sciences(No.QYZDJSSWJSC011) the Science Challenge Project(No.TZ2016001) the Zhejiang Provincial Natural Science Foundation(No.LGG21E010005) 

主　　题：High entropy alloy Lattice distortion Magnetic property Low temperature In situ SR-XRD 

摘      要：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 temperature ***,little attention has been paid to the evolution of lattice distortion with temperature decreasing and its effects on deformation behavior and magnetic state *** 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 Cr Co Ni MEA,Cr Fe Co Ni and Cr Mn Fe Co Ni *** measurements at corresponding low temperatures and cryogenic ranges are further *** 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)*** is thus suggested that lattice distortion reduction possibly makes a critical contribution to deformation mechanism *** magnetic measurement results show a clear ferromagnetic transition of Cr Fe Co Ni HEA when temperature is below 173 ***,no obvious magnetic state transition is observed for Cr Co Ni MEA and Cr Mn Fe Co Ni *** present findings on lattice distortion evolutions will pave the way for designing targeted HEAs with particular properties.