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A Study on the Strength Evaluation of Welded Joints for Degraded Material  

정의정 (목포대학교 기계공학과 대학원)
윤한용 (목포대학교 기계공학과)
임명환 (목포해양대학교 실습선)
김태식 (동아인재대학교)
Publication Information
Journal of the Korean Society for Precision Engineering / v.19, no.11, 2002 , pp. 75-82 More about this Journal
Abstract
Welding is used not only for the shipbuilding, but also for the repairing of ships. While repairing of ships, it is inevitable to weld new materials with degraded materials. In this case, it is predicted that the strength of both the sections is not identical each other. In this study, the respective welded joints in terms of mechanical properties such as microstructure, mechanical strength and fatigue crack propagation, with the component obtained from the barge used for a long-term period, were analyzed. It was found that the material degradation had a significant effect on the welded joints. The fatigue crack propagation in welded sections showed a big difference. The rate of fatigue crack growth of degraded material for both heat affected zone and parent metal was faster than that of new material. By contrast, the result from identical materials showed that the rate of fatigue crack growth of the heat-affected zone was slower than that of parent metal.
Keywords
New material; Degraded material; Welded joints; Fatigue crack propagation; Heat affected zone; Parent metal;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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