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Acta Metall Sin  1982, Vol. 18 Issue (6): 676-765    DOI:
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STRESS CORROSION AND HYDROGEN INDUCED CRACKING BEHAVIOUR IN AN Al ALLOY
Wang Yanbin; Chu Wuyang; Xiao Jimei (Belling University of Iron and Steel Technology)
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Wang Yanbin; Chu Wuyang; Xiao Jimei (Belling University of Iron and Steel Technology). STRESS CORROSION AND HYDROGEN INDUCED CRACKING BEHAVIOUR IN AN Al ALLOY. Acta Metall Sin, 1982, 18(6): 676-765.

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Abstract  A metallographic investigation was made to follow the dynamical process of the initiation and propagation of hydrogen induced delayed cracking (HIDC) toward a charged modified WOL specimen made of high strength Al alloy. It was shown that the size of the plastic zone in front of crack, namely hydrogen induced delayed plasticity (HIDP) was continuously enlarged with time prolonged. Development of HIDP to a critical value leads to the initiation and propagation of HIDC as well as SCC in high purity water or 3.5% NaCl aqueous solution. The effects of testing temperature, polarization voltage and chlorine ion on K_(ISCC) and da/dt in high purity water are found to be identical to the influence upon the amount of hydrogen evolved when the specimen immersed in HCl solution of pH=3.5 or 1.0. These results may support such viewpoint that HIDC plays an important role in the behaviour of SCC of high strength Al alloy in aqueous solution.
Received:  18 June 1982     
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https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1982/V18/I6/676

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