Microstructure and Properties of FeCrNiCoMnx, High-Entropy Alloy Coating Prepared by Laser Cladding

作者：Zhang Chong; Wu Bingqian; Wang Qianting; Chen Dingning; Dai Pinqiang^*

来源：Rare Metal Materials and Engineering, 2017, 46(9): 2639-2644.

• high-entropy alloy
• laser cladding
• wear resistance
• borides
• stacking faults

A FeCrNiCoMnBx high-entropy alloy coating was prepared by laser cladding on a low carbon steel substrate. The effect of boron addition on the microstructure, hardness, and wear resistance of FeCrNiCoMnBx was studied. The formation mechanism of stacking faults (SFs) in boride was analyzed. Results show that the coating has a simple fcc structure with boride precipitation. Boride precipitation is mainly the (Cr,Fe)(2)B phase when the boron content x is increased from 0.25 to 0.75. However, as the value of x reaches 1.0, many (Fe, Cr)(2)B phases are found in the boride. The volume fraction of borides increases with the increase in boron content. Hardness and wear resistance of the coating are also enhanced. (Fe,Cr)(2)B borides have high-density SFs on the ((1) over bar 10) planes. The generation of SFs in (Fe,Cr)(2)B is probably attributed to the (Fe, Cr)(2)B ->(Cr,Fe)(2)B phase transformation by a simple shear of (Fe,Cr)(2)B ((1) over bar 10) planes (with shear vectors at nearly 1/4 [11 (1) over bar).

• 出版日期2017-9
• 单位福建工程学院; 福州大学