FeCrCoNiTiAl alloy coating by laser direct deposition

被引：0

作者：

Chen, Sui-Yuan ^{[1
]}

Chen, Xiao-Long ^{[1
]}

Li, Hui-Li ^{[2
]}

Yin, Li-Xin ^{[2
]}

Liang, Jing ^{[1
]}

Liu, Chang-Sheng ^{[1
]}

机构：

[1] Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang,110819, China

[2] Research Academy, Northeastern University, Shenyang,110819, China

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2014年 / 35卷

关键词：

Crystal structure - Chromium alloys - Coatings - Cracks - Entropy - Iron alloys - Microstructure - Semiconductor lasers - Deposition - Grain boundaries - Microhardness;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A FeCrCoNiTiAl high entropy alloy coating was deposited on the surface of 45 steel by a semiconductor laser. The microstructure, deposition layer composition, phase composition, microhardness, crack elimination mechanism were studied using OM, EDS, SEM, XRD and the microhardness tester. The experimental results showed that the optimal process parameters for this test were as follows: laser power 140 0 W; defocus amount 312 mm, spot size 7.18 mm×4.30 mm, scanning speed 300 mm/min and overlapping ratio of 10%. The thickness of the deposition coating was 0.6 mm, and the deposition coatings displayed homogeneous microstructure with little cracks, holes and other defects. The crystal structure of FeCrCoNiTiAl deposition layers was simple BCC solid solution, and more importantly, their microstructures were mainly equiaxed grains with different size. At the same time, Ti-rich phases were precipitated in both grain boundary and interior, and the microhardness reached up to about 650 HV. ©, 2014, Northeastern University. All right reserved.

引用

页码：64 / 67