Metallurgical investigations of laser welding of AISI 304 stainless steel

被引：0
|
作者：
Mousavi, S. A. A. Akbari [1 ]
Gharedaghi, A. [1 ]
Mastoori, M. [1 ]
机构：
[1] Univ Tehran, Sch Met & Mat Engn, Univ Coll Engn, Tehran, Iran
来源：
ADVANCED WELDING AND MICRO JOINING / PACKAGING FOR THE 21ST CENTURY | 2008年 / 580-582卷
关键词：
Nd : YAG pulsed laser welding; stainless steel; heat affected zone (HAZ); hot crack;
D O I：
10.4028/www.scientific.net/MSF.580-582.41
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Laser welding of AISI 304 stainless steel was carried out by pulsed Nd:YAG laser machine under different welding conditions. Geometrical shape of the joints was circular butt. Studies were focused on laser power, welding velocity, beam diameter and pulse duration. Microstructure of welded joints was investigated by optical microscopy (OM) and scanning electron microscopy (SEM). OM and SEM results show no evidence of grain growth in heat affected zone (HAZ). In addition, columnar and equiaxed grains are observed in the weld metal. Various defects such as lack of fusion, underfill, porosity, hot crack and mismatch are observed as a result of improper welding conditions. The best welding conditions to obtain Minimum defects are presented.
引用
收藏
页码：41 / 44
页数：4
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