MICROSTRUCTURE ANALYSIS OF RARE EARTH-MAGNESIUM ALLOY REPAIRED USING HIGH POWER SURFACE LASER CLADDING

被引：0
|
作者：
Yang, Rongjuan [1 ]
Ge, Dongyun [1 ]
Zhao, Xuan [1 ]
机构：
[1] Tsinghua Univ, Sch Aerosp Engn, Beijing 100084, Peoples R China
来源：
IRF2018: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON INTEGRITY-RELIABILITY-FAILURE | 2018年
关键词：
magnesium alloys; microstructure; laser cladding; repairing;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The similar composition to matrix magnesium alloy coating was prepared on the surface of magnesium alloy via high power laser cladding. Micro-morphology of repairing coating was characterized by scanning electron microscopy (SEM). The energy-dispersive spectrometer (EDS) and X-ray diffraction (XRD) confirmed the phase of coating. The microhardness of the magnesium alloy coatings were analyzed by microhardness tester. It was found that coatings showed good adhesion to magnesium alloy substrate. The average grain diameters of laser repaired coatings were significantly smaller than that of casting base metal, and the microstructure of laser repaired coatings consisted of the matrix alpha-Mg and the lamellar beta-Mg17Al12 in the grain boundaries. The coating has the average micro-hardness about 180 HV, which is 2-3 times higher than that of the rare magnesium matrix.
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页码：369 / 370
页数：2
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