Journal of the Korean Society of Safety (한국안전학회지)
- Volume 12 Issue 2
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- Pages.57-64
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- 1997
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- 1738-3803(pISSN)
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- 2383-9953(eISSN)
Fatigue Crack Propagation Behavior for Electron Beam Welded Joint of SUS 321
SUS 321 전자비임 용접부의 피로균열진전거동
Abstract
Fatigue crack propagation behaviors and life prediction for SUS 321 plate and its electron beam weld metal were investigated using compact tension specimens. The larger the stress ratio is, the faster the crack propagates, but the variation of crack propagation rate decreases. The effect of stress ratio is greater in the slow crack propagation area than in the faster one. The crack propagation rate of electron beam weld metal is faster than that of base metal because of hardening, weld defect and residual stress in welding area. The crack propagation rate of transverse weld metal has a lower than that of base metal due to the effect of residual stress, but in the time of passing through welding area, has a higher rate. The crack propagation rate using
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