Investigating the spot weld fatigue crack growth proces using X-ray imaging

被引：0
|
作者：
Wang, G [1 ]
Barkey, ME [1 ]
机构：
[1] Univ Alabama, Dept Aerosp Engn, Tuscaloosa, AL 35487 USA
来源：
WELDING JOURNAL | 2006年 / 85卷 / 04期
关键词：
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
An x-ray technique was used to investigate the fatigue crack initiation and crack propagation processes of spot welded joints. The fatigue cracks usually initiate 0.2-1.0 mm from the nugget edge of the spot weld. Finite element and theoretical analyses indicated that the maximum stress concentration is away from the nugget root. Three different fatigue crack propagation modes have been observed that correspond to different loading amplitude regimes. Lastly, fatigue crack propagation rates are presented for galvannealed and galvanized metals.
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页码：84S / 90S
页数：7
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