Effects of Varying Copper Content on the Microstructure and Mechanical Properties of FeCoNiCu_(x)  

作　　者：YANG Yanru ZHANG Yichen LI Jiawen ZHU Heguo 杨颜如;ZHANG Yichen;LI Jiawen;朱和国(College of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing,210094,China)

机构地区：[1]College of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing,210094,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2022年第5期986-991,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(Nos.51371098,51571118);National Undergraduate Training Program for Innovation and Entrepreneurship(No.201910288094Z)。

摘　　要：Five sets of high entropy alloys(HEAs)FeCoNiCu_(x)(x=0.5,1.0,1.5,2.0,2.5)were produced by vacuum induction smelting.The effects of Cu content on the microstructure and mechanical properties of the alloys were interrogated by X-ray diffractometer(XRD),field scanning electron microscope(FESEM)and tensile mechanical test.The result shows that the HEAs form single FCC solid solution phase.With the increase of Cu content,the diffraction peak first deviated to the right and then shifted to the left.The alloys changed from equiaxed crystal structure to refined dendritic crystal structure,as Cu content increased.A large number of Cu atoms are isolated in the inter-crystalline region.The tensile mechanical tests show that with the increase of Cu content,the ultimate tensile strength first increased and then decreased.When x is 2.0,the ultimate tensile strength reaches a maximum of 473 MPa,the percent elongation is 43.0%,and the fracture presents ductile behaviour.

关 键 词：FeCoNiCu alloy copper content microstructure elemental segregation mechanical properties 

分 类 号：TG139[一般工业技术—材料科学与工程]