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EFFECT OF STRESS ON INITIATION AND PROPAGATION OF CORROSION FATIGUE CRACKS FOR TYPE 316L STAINLESS STEEL IN HANK'S PHYSIOLOGICAL SOLUTION |
XIE Jianhui WU Yinshun ZHU Rizhang (Department of Surface Science & Corrosion Engineering; University of Science & Technology Beijing) |
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Abstract The effect of stress on the initiation and propagation of corrosion fatigue cracks for type 316L stainless steel in Hank's physiological solution was studied. The open circuit potential was not affected by dynamic stress, but the pitting potential decreased with the increase in stress. Pitting corrosion occurred more easily under the effect of stress and the area of higher stress concentration showed higher pit density. Under the coaction of stress and corrosive medium, several corrosion fatigue microcracks might initiated intergranularly at the pit bottom. One of them became the main crack and propagated transgranularly due to stress concentration at the crack tip. The fatigue striation and secondary cracks were observed on the fracture surface.
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Received: 25 February 1997
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Cite this article:
XIE Jianhui WU Yinshun ZHU Rizhang (Department of Surface Science & Corrosion Engineering; University of Science & Technology Beijing). EFFECT OF STRESS ON INITIATION AND PROPAGATION OF CORROSION FATIGUE CRACKS FOR TYPE 316L STAINLESS STEEL IN HANK'S PHYSIOLOGICAL SOLUTION. J Chin Soc Corr Pro, 1997, 17(1): 31-35.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1997/V17/I1/31
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