Microstructure and Properties of Laser Cladding Graphene Reinforced CoCrFeNiTi High-Entropy Alloy

被引：1
作者：
Qiu, Xingwu [1 ,2 ]
机构：
[1] Sichuan Coll Architectural Technol, Multicomponent Alloys Key Lab Deyang City, Deyang 618000, Peoples R China
[2] Sichuan Coll Architectural Technol, Dept Mat Engn, Deyang 618000, Peoples R China
来源：
JOURNAL OF RUSSIAN LASER RESEARCH | 2023年 / 44卷 / 05期
关键词：
laser cladding; high-entropy alloy; graphene; microstructure; mechanical property; corrosion performance; CORROSION BEHAVIOR; MECHANICAL-PROPERTIES; PHASE; TEMPERATURE; ELEMENT; DESIGN;
D O I：
10.1007/s10946-023-10167-1
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The graphene (Gr) reinforced CoCrFeNiTi high-entropy alloys (HEAs) were prepared, using laser cladding technology based on CO2 gas laser. The effect of Gr on microstructure, mechanical properties, and corrosion resistance of the HEAs is studied. The experimental results indicate that the main microstructure of Gr/CoCrFeNiTi HEAs is equiaxed grains, with precipitated phases filled between the grains. Graphene plays a role in refining grains. The Gr/CoCrFeNiTi HEAs composite coating consists of the face centered cubic (FCC), body centered cubic (BCC), and M23C6 in-situ formed carbides. Graphene ptroduces the effect of promoting the formation of BCC and M23C6 carbides. The coatings hardness tends to increase with the increase of Gr addition, and the hardness is closely related to solid solution strengthening, fine grain strengthening, and dispersion strengthening. As Gr increases, the both wear resistance and corrosion resistance increase first and then decrease. The hardness, Gr, and the content of hard and brittle carbides in the coating have impact on the wear resistance.
引用
收藏
页码：590 / 596
页数：7
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