In-situ TiC-Al3Ti reinforced Al-Mg composites with Y2O3 addition formed by It laser cladding on AZ91D

被引：46
|
作者：
Yang, Liuqing [1 ]
Li, Zhiyong [1 ]
Zhang, Yingqiao [1 ]
Wei, Shouzheng [1 ]
Wang, Yongji [1 ]
Kang, Yang [1 ]
机构：
[1] North Univ China, Coll Mat Sci & Engn, Taiyuan 030051, Shanxi, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2020年 / 383卷
关键词：
Al-Mg composites; Y2O3; In situ reaction; Laser cladding; Microstructure evolution; Wear and corrosion; MAGNESIUM ALLOY; PHYSICAL-PROPERTIES; MATRIX COMPOSITE; MICROSTRUCTURE; COATINGS; RESISTANCE; CORROSION; BEHAVIOR; WEAR; TIN;
D O I：
10.1016/j.surfcoat.2019.125249
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In-situ TiC-Al3Ti reinforced Al-Mg composites were formed by laser cladding of (Al + Ti + B4C)/Y2O3 composites on A291D. A series of experiments, including SEM, XRD and EDS, had been carried out to investigate the effect of Y2O3 on microstructure evolution of in-situ generated TiC-Al3Ti phases, which has a positive impact on the comprehensive surface performance of the reinforced Al-Mg composites. The results showed that more precipitates with different morphology were formed in the composites ascribe to the addition of rare earth. The morphology of Al3Ti changes from rod shape to X shape when the content of Y2O3 increases. A large amount of Al3Ti and TiC aggregated in the composite with 2% Y2O3. Based on the experiments, the growth mechanism model of Al3Ti and TiC was proposed. The appropriate addition of Y2O3 can ameliorate the micro-hardness, wear resistance and corrosion resistance of the composites.
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页数：11
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