Anisotropy of microstructures and mechanical properties in FeCoNiCr_(0.5)high-entropy alloy prepared via selective laser melting  

作　　者：Xu-Han Gu Tao Lu Tao Zhang Wei Guo Ye Pan Ting Dai 

机构地区：[1]School of Materials Science and Engineering,Jiangsu Key Laboratory of Advanced Metallic Materials,Southeast University,Nanjing 211189,China

出　　处：《Rare Metals》2022年第6期2047-2054,共8页稀有金属（英文版）

基　　金：financially supported by the National Key R&D Program of China (No.2018YFB1106100);the Research Fund of Jiangsu Key Laboratory for Advanced Metallic Materials,Southeast University (No.AMM2021A02)

摘　　要：The anisotropy of microstructures and mechani-cal properties of FeCoNiCr_(0.5)high-entropy alloys(HEAs)prepared by selective laser melting(SLM)were investigated in this study.An anisotropic microstructure was obtained for the as-built FeCoNiCr_(0.5) HEA sample.Specifically,in the XOY plane(perpendicular to the building direction),the{110}texture is dominant,and the grain size is mostly between 40 and 60μm with equiaxial morphology.In the XOZ plane(parallel to the building direction),columnar grains have a length of 80-100μm,and there is no obvious preferred orientation in the structure.This structure leads to anisotropic tensile behavior in the sample where the yield strength,tensile strength,and elongation of FeCoNiCr_(0.5)HEA in the XOY plane are 528 MPa,546 MPa,and 49%,respectively,whereas those in the XOZ plane are 547 MPa,642 MPa,and 28%,respectively.The effect of deformation twins on the evolution of the work-hardening rate is also discussed,considering the anisotropy condition.

关 键 词：High entropy alloy Selective laser melting ANISOTROPY Mechanical property MICROSTRUCTURE 

分 类 号：TG139[一般工业技术—材料科学与工程]