Effects of Specimen Thickness on Stress Corrosion Cracking and Corrosion Fatigue of an Aluminum Alltoy
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概要
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Sustained load stress corrosion cracking (SCC), Cyclic SCC (FSCC) and corrosion fatigue tests in 3.5% NaCl were performed on sensitized high-strength Al alloy specimens having various thicknesses. The SCC crack growth results from alternation between a crack growth of an anodic dissolution at grain boundaries and a brittle fracture of a ligament zone by hydrogen embrittlement. The influence of specimen thickness is observed not only on the threshold value for SCC crack growth K_<ISCC> but on the threshold value for FSCC crack growth K_<FSCC> ; the greater the thickness is, the lower the K_<ISCC> and the K_<FSCC> are. It is significant that the lowering of K_<FSCC> against K_<ISCC> becomes remarkably greater in a thick specimens. The thickness effect on the SCC and FSCC crack growths can be explained by the difference of constraint condition at crack tips.
- 一般社団法人日本機械学会の論文
著者
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Endo Kichiro
Deparfment Of Mechanical Engineering Kyoto University
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Komai Kenjiro
Department Of Mechanical Engineering Kyoto University
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Komai Kenjiro
Department Of Mechanical Engineering Graduate School Of Engineering Kyoto University
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YAMAMOTO Ikuva
Nippon Steel Corporation
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Endo Kichiro
Department Of Mechanical Engineering Kyoto University
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