Nanoscratching and mechanical behaviors of high-entropy alloys with different phase constituents

作     者：Jiang-li Ning Yun-li Feng Xu-dong Li Qi-bo Deng Yong-jiang Huang 

作者机构：College of Metallurgy and EnergyNorth China University of Science and TechnologyTangshan 063210HebeiChina Tianjin Key Laboratory of Advanced Functional Porous MaterialsInstitute for New Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2019年第26卷第11期

页      面：1240-1248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：The authors are grateful for the financial supports from the Defense Industrial Technology Development Program(No.JCKY2018407C008) the National Natural Science Foundation of China(NSFC)(Grant Nos.51304061 and 51474092) the NCST Science Fund for Distinguished Young Scholars(No.JQ201702) 

主　　题：High-entropy alloy Nanoscratch Mechanical property Microstructure-Failure mode 

摘      要：High-entropy alloys(HEAs)exhibit unique microstructural features and properties in nanoscale and atomic scale because of their multi-element alloy *** nanoscratching behaviors of three HEAs with different phase constituents,relative to the microstructure and mechanical properties of the HEAs,were *** typical phase constituents were selected:face-centered cubic(FCC)structure,body-centered cubic(BCC)structure,and a dual-phase structure containing both FCC and BCC *** the fact that the FCC alloy has the highest ductility and strain hardening capability,it exhibited inferior scratch resistance due to the over-softening of *** to the brittle failure mode,the BCC alloy hardly exhibited desirable scratch resistance despite its highest *** contrast,the nanostructured dual-phase alloy exhibited the best scratch resistance because of its good combination of strength and ductility,as well as the ductile failure *** research suggests that the HEA with structure comprising nanoscale hard and soft phases is desirable for nanoscratch resistance,and possesses appropriate hardness for industrial applications.