Microstructure and Wear Resistance of Fe_(4)CoCrNiB_(0.2)Mo_(x)(x=0,0.5,1) High Entropy Alloys  

作　　者：BAO Yefeng GUO Linpo ZHONG Chonghui SONG Qining YANG Ke JIANG Yongfeng WANG Zirui 包晔峰;GUO Linpo;ZHONG Chonghui;SONG Qining;YANG Ke;JIANG Yongfeng;WANG Zirui(College of Mechanical and Electrical Engineering,Hohai University,Changzhou 213002,China)

机构地区：[1]College of Mechanical and Electrical Engineering,Hohai University,Changzhou 213002,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2022年第2期261-269,共9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(No.51879089)。

摘　　要：To improve the wear resistance of Fe_(4)CoCrNiB_(0.2) high-entropy alloy(HEA),the Fe_(4)CoCrNiB_(0.2)Mo_(x)(where,x in Fe_(4)CoCrNiB_(0.2)Mo_(x) is a molar content,and the value is 0,0.5,1,respectively)HEAs were prepared on the Q235 substrate by laser cladding.The structure,hardness,and wear resistance of Fe_(4)CoCrNiB_(0.2)Mo_(x) HEAs were investigated using scanning electron microscopy with spectroscopy(SEM/EDS),X-ray diffraction(XRD),Vickers microhardness tester,and pin-on-disc tribometer.The influences of Mo content on the phase structures and mechanical properties of Fe_(4)CoCrNiB_(0.2)Mo_(x) HEAs are studied.The experimental results show that the Fe_(4)CoCrNiB_(0.2)Mo_(x) HEA cladding layers are composed of a simple BCC phase mixed with M_(2)B phase,BCC phase,and BCC+FCC dual-phase,respectively.The wear resistance and hardness of the Fe_(4)CoCrNiB_(0.2)Mo HEA sample are 2 and 1.35 times those of the Fe_(4)CoCrNiB_(0.2) HEA sample,respectively.The microhardness and wear resistance of the Fe_(4)CoCrNiB_(0.2)Mo_(x) HEAs increase with the increase of Mo content.It is found that the Fe_(4)CoCrNiB_(0.2)Mo_(x) HEA cladding layers are mainly strengthened by the solid solution strengthening and fine-grained strengthening.

关 键 词：SEM XRD high-entropy alloys laser cladding 

分 类 号：TG139[一般工业技术—材料科学与工程]