Pore formation during CWNd:YAG laser welding of aluminum alloys for automotive applications

被引：8
作者：
Pástor, M [1 ]
Zhao, HL
DebRoy, T
机构：
[1] Escuela Super Politecn Chimborazo, Fac Mecan, Riobamba, Ecuador
[2] Penn State Univ, Dept Mat Sci & Engn, State Coll, PA USA
来源：
REVISTA DE METALURGIA | 2000年 / 36卷 / 02期
关键词：
pore formation; Nd : YAG laser welding; aluminum alloys;
D O I：
10.3989/revmetalm.2000.v36.i2.562
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Pore formation is an important concern in laser welding of automotive aluminum alloys. This paper investigates the influence of the laser beam defocusing on pore formation during continuous wave Nd:YAG laser welding of aluminum automotive alloys 5182 Ind 5754. It mas found that the instability of the keyhole during welding was a dominant cause of pore formation while hydrogen rejection played an insignificant role. The defocusing of the laser beam greatly affected the stability of the keyhole. Finally, the mechanism of the collapse of the keyhole and pore formation is proposed.
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页码：108 / 117
页数：10
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