摘要
采用最大输出激光脉冲能量为12.5 J的Thales Laser激光器对AZ31镁合金交叉轧制薄板进行激光冲击成形(LSF),在此基础上研究和分析了激光冲击表面结构和电化学特性。结果表明:LSF属于厚度减薄机制,失效形式具有韧性断裂和脆性断裂混合特征;LSF内凹面出现了纹理清晰的周期性波纹结构,波纹间距为纳米级,伴随着激光冲击强化效应和微观结构改变,镁合金耐腐蚀性得到提高。
The cross-rolled AZ31 magnesium alloy sheets were laser sh℃ked by the Thales Laser with the maximum output laser pulse energy of 12.5 J. Then the surface microstructure and electrochemical properties of the alloy after laser sh℃king forming（LSF） was studied. The results show that LSF belongs to thinning mechanism, its failure mode exhibits a mixed feature of ductile fracture and brittle fracture. Periodic wave structure with clear texture is observed in the LSF concave, and the values of spacing between waves reach to nanoscale. The corrosion resistance of magnesium alloy is improved by the laser sh℃king peening effect and the microstructure change.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2015年第8期1899-1903,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金资助项目(51175231)
关键词
AZ31镁合金
激光冲击成形
微观结构
残余应力
电化学腐蚀
AZ31 magnesium alloy
laser shock forming（LSF）
microstructure
residual stress
electrochemical corrosion
