A novel HfNbTaTiV high-entropy alloy of superior mechanical properties designed on the principle of maximum lattice distortion

作     者：Zibing An Shengcheng Mao Yinong Liu Li Wang Hao Zhou Bin Gan Ze Zhang Xiaodong Han Zibing An;Shengcheng Mao;Yinong Liu;Li Wang;Hao Zhou;Bin Gan;Ze Zhang;Xiaodong Han

作者机构：Beijing Key Lab of Microstructure and Property of Advanced MaterialsFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing100124China Department of Mechanical EngineeringThe University of Western AustraliaPerthWA6009Australia Nano and Heterogeneous Structural Materials CenterSchool of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing210094China Beijing Key Laboratory of Advanced High Temperature MaterialsCentral Iron and Steel Research InstituteBeijing100081China State Key Laboratory of Silicon MaterialsDepartment of Materials Science and EngineeringZhejiang UniversityHangzhou310058China 

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

年 卷 期：2021年第79卷第20期

页      面：109-117页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：This work was financially supported by the Basic Science Center Program for Multiphase Evolution in Hyper-gravity of the National Natural Science Foundation of China(No.51988101) the National Natural Science Foundation of China(Nos.52071003,91860202,11604006) the Beijing Municipal Education Commission Project(Nos.PXM2020-014204-000021and PXM2019-014204-500032) the Beijing Outstanding Young Scientists Projects(No.BJJWZYJH01201910005018) the Beijing Natural Science Foundation(No.Z180014) the“111”project(No.DB18015) supported by the Australian Research Council(No.DP190102990)。 

主　　题：High-entropy alloy Solid solution strengthening Strengthening mechanism Mechanical properties 

摘      要：This paper reports a synergistic design of high-performance BCC high-entropy alloy based on the combined consideration of the principles of intrinsic ductility of elements,maximum atomic size difference for solid solution strengthening and the valence electron concentration criterion for ductility.The single-phase BCC HfNbTaTiV alloy thus designed exhibited a high compressive yield strength of 1350 MPa and a high compressive ductility of45%at the room temperature.This represents a 50%increase in yield strength relative to a HfNbTaTiZr alloy.This is attributed to the maximized solid solution strengthening effect caused by lattice distortion,which is estimated to be 1094 MPa.The alloy was also able to retain 53%of its yield strength and 77%of its ductility at 700℃.These properties are superior to those of most refractory BCC high-entropy alloys reported in the literature.