Low cycle fatigue (LCF) behavior of an A533B-type low-alloy pressure vessel steel was investigated in 200 degrees C and 288 degrees C water. Major attention was paid to the role of dynamic strain aging (DSA) on corrosion fatigue behavior of the steel. It was found that DSA played a noticeable role in the present corrosion fatigue process, manifested by the strain-rate and temperature dependent cyclic stress and plastic strain amplitude response. DSA was found to occur at a low strain rate in 200 degrees C water or at a high strain rate in 288 degrees C water regardless of dissolved oxygen concentration (DO) in water. In low-DO water, DSA improved the LCF resistance of the steel to some extent, but such an effect was screened by the environmental effects in high-DO water. The interactions between DSA and surrounding environmental factors as well as their possible influence on environmentally assisted cracking and fatigue resistance of the steel in high temperature water are discussed.
部门归属
inst met sci & technol, environm corros ctr, new delhi 110016, india. natl inst mat sci, corros resistant design grp, steel res ctr, tsukuba, ibaraki 3050047, japan.;wu, xq (reprint author), inst met sci & technol, environm corros ctr, 62 wencui rd, new delhi 110016, india;xqwu@imr.ac.cn
X. Q. Wu,Y. Katada. Role of dynamic strain aging in corrosion fatigue of low-alloy pressure vessel steel in high temperature water[J]. Journal of Materials Science,2007,42(2):633-639.
APA
X. Q. Wu,&Y. Katada.(2007).Role of dynamic strain aging in corrosion fatigue of low-alloy pressure vessel steel in high temperature water.Journal of Materials Science,42(2),633-639.
MLA
X. Q. Wu,et al."Role of dynamic strain aging in corrosion fatigue of low-alloy pressure vessel steel in high temperature water".Journal of Materials Science 42.2(2007):633-639.
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