Journal of Ocean Engineering and Technology (한국해양공학회지)
- Volume 2 Issue 2
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- Pages.122-129
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- 1988
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- 1225-0767(pISSN)
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- 2287-6715(eISSN)
Study on the Retardation Effect of Overload on the Corrosion Fatigue Crack Propagation Al-Alloy used for the Shipbuilding
과하중에 의한 선박용 알루미늄 합금재의 부식피로 파괴지연에 관한 연구
- Published : 1988.12.01
Abstract
Recently with the rapid development in marine and shipbuliding industries such as marine structures, ship and chemical plants, there occurs much interest in the study of corrosion fatigue characteristics which was closed up an important role in mechanical design. In this study, the 5086 Al-alloy was tested by use of rotary bending fatigue tester. The retardation effect of overload on the corrosion fatigue crack propagation in sea environment was quantitatively studied. 1) Retardation effect of corrosion fatigue crack propagation is most eminent when overload ratio is 1.52, overload magnitude corresponds to about 77% and 55% of yield strength and tensile strength respectively. 2) After overload ratio 1.52 was used, retardation of corrosion fatigue crack growth rate is largely retarded and quasi-threshold stress intensity factor range(
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