Effect of excimer laser surface melting on the microstructure and corrosion performance of the die cast AZ91D magnesium alloy

被引：92
|
作者：
Coy, A. E. [1 ]
Viejo, F. [1 ]
Garcia-Garcia, F. J. [1 ]
Liu, Z. [1 ]
Skeldon, P. [1 ]
Thompson, G. E. [1 ]
机构：
[1] Univ Manchester, Sch Mat, Ctr Corros & Protect, Manchester M60 1QD, Lancs, England
来源：
CORROSION SCIENCE | 2010年 / 52卷 / 02期
基金：
英国工程与自然科学研究理事会;
关键词：
Magnesium alloys; EIS; Polarisation; Passivity; SCANNING KELVIN PROBE; FORCE MICROSCOPY; WEAR-RESISTANCE; LITHIUM ALLOY; BETA-PHASE; BEHAVIOR; AA2024-T3;
D O I：
10.1016/j.corsci.2009.09.025
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Excimer laser surface melting (LSM) of the die cast AZ91D alloy has been investigated in terms of microstructure and corrosion behaviour. Excimer LSM of the alloy resulted in a highly homogeneous and refined melted microstructure, which improved the corrosion resistance of the alloy. The latter was associated with the large dissolution of intermetallic phases and the enrichment of aluminium within the melted layer. An increased number of laser Pulses resulted in thicker melted layers, but also in enhanced porosity and the formation of micro-cracks at the overlapping area. Both factors diminished the corrosion resistance of the laser-treated alloy. (c) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：387 / 397
页数：11
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