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金属学报  1982, Vol. 18 Issue (6): 676-765    
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铝合金的应力腐蚀和氢致裂纹研究
王燕斌;褚武扬;肖纪美
北京钢铁学院;研究生;北京钢铁学院;北京钢铁学院
STRESS CORROSION AND HYDROGEN INDUCED CRACKING BEHAVIOUR IN AN Al ALLOY
Wang Yanbin; Chu Wuyang; Xiao Jimei (Belling University of Iron and Steel Technology)
引用本文:

王燕斌;褚武扬;肖纪美. 铝合金的应力腐蚀和氢致裂纹研究[J]. 金属学报, 1982, 18(6): 676-765.
, , . STRESS CORROSION AND HYDROGEN INDUCED CRACKING BEHAVIOUR IN AN Al ALLOY[J]. Acta Metall Sin, 1982, 18(6): 676-765.

全文: PDF(2526 KB)  
摘要: 用恒位移试样跟踪观察了铝合金在电化学充氢和应力腐蚀条件下氢致裂纹的产生和扩展过程。结果表明,裂纹前端的塑性区及其变形量随时间延长而逐渐增大,当它发展到临界条件时就导致氢致滞后裂纹和应力腐蚀裂纹的产生和扩展。 试验温度、外加极化电压以及氯离子对K_(ISCC)以及da/dt的影响和它们对浸泡充氢后的放氢总量的影响相一致。
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.
收稿日期: 1982-06-18     
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