Influence of hydrogen and frequency on fatigue crack growth behavior of Cr-Mo steel
作者： Saburo Matsuoka , Hiroyuki Tanaka , Nobuhiro Homma , Yukitaka Murakami
DOI: 10.1007/S10704-010-9560-Z
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摘要: Fatigue tests on Cr-Mo steel quenched at 860°C and tempered 580°C were carried out under the frequencies of 0.2, 2, 20 Hz with specimens containing a small artificial hole. An additional test in which frequency was alternately switched between 0.02 2 out. Hydrogen charging to by an immersion method. The fatigue life hydrogen-charged remarkably decreased comparison that uncharged specimens. crack growth rate da/dN increased decreasing f. acceleration saturated \({\Delta K\,<\,17\,{\rm MPa}\sqrt{m}}\) for f ≤ Hz. presence upper bound found respect effects hydrogen environment. switching resulted difference morphology is presumed be caused concentration vicinity tip. particular low localization slip around tip linearization path. hydrogen-enhanced striation formation model proposed explain effect austenitic stainless carbon can applied also this study.
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