CHANGES OF CRACK GROWTH MORPHOLOGY IN STEEL UNDER CORROSION FATIGUE CONDITION

Acta Metall Sin

1980, Vol. 16

Issue (4): 454-500 DOI:

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CHANGES OF CRACK GROWTH MORPHOLOGY IN STEEL UNDER CORROSION FATIGUE CONDITION

Zheng Wenlong Shanghai Institute of Material Research

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Zheng Wenlong Shanghai Institute of Material Research. CHANGES OF CRACK GROWTH MORPHOLOGY IN STEEL UNDER CORROSION FATIGUE CONDITION. Acta Metall Sin, 1980, 16(4): 454-500.

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Abstract Through the analysis of parts failed in service by electronfractography andfracture mechanics, and by corrosion fatigue (CF) and stress corrosion cracking(SCC) experiments, it was shown that under the condition of CF,the crackingmorphology of steel is not merely governed by a single mechanism. It dependsupon the critical stress intensity factor of the steel K_(IC), CF maximum stress in-tensity factor K_(Imax), threshold SCC intensity factor range △K, frequency f, stressratio R, etc. In case of (dK/da)>0, three basic fracture morphologies wereobserved: (a) when K_(Imax)

Received: 18 April 1980

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1980/V16/I4/454

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