Abstract
A corrosion fatigue crack propagation test for 430 stainless steel and its heat affected zone was conducted in pH buffer solutions, and the results were compared with model predictions. The bare corrosion effect on fatigue crack propagation, particularly in corrosive environments was evaluated by means of a modified Forman equation. As shown in the results, the average corrosion rate determined from the ratio of corrosion induced crack length to the entire crack length under a cycle load was 0.11 and 0.37 for the base metal and heat affected zone, respectively, with a load ratio of 0.5, frequency of 0.5, and a pH 10.0 environment. The modeling and experimental processes demonstrate a step towards a methodology enabling the corrosion effects on fatigue crack propagation behavior to be determined.
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Recommended by Associate Editor Jin Weon Kim
Heung-Shik Lee received his Ph.D. (2009) in Mechanical Engineering from Inha University, Republic of Korea. He is currently a research professor at the School of Mechanical Engineering at Hanyang University, in Seoul. His current interests are micromachining, micromagnetics, structure analysis, and finite element applications. In this research, he contributed to the interpretation of corrosion fatigue crack propagation with numerical analysis.
Sung-Ho Bang received his B.S. degree (2013) in Mechanical Engineering from Hanyang University, Republic of Korea. He is currently a M.S. student in Automotive Engineering in the graduate school of Hanyang University. In this study, he carried out corrosion fatigue crack propagation tests and fractographic analysis.
Tae-Won Kim received his D.Phil. (1998) in Engineering Science from Oxford University, UK. He is currently a professor at the School of Mechanical Engineering at Hanyang University and director of the Survivability Technology Defense Research Center. His current interests are modeling materials behavior, failure analysis, and finite element implementation. In this research, he is in charge of overall modeling and experimental work, particularly with microstructural characteristics.
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Lee, HS., Bang, SH. & Kim, TW. Corrosion effects on fatigue crack propagation of stainless steel and its heat affected zone in pH buffer solutions. J MECH SCI TECHNOL 28, 4037–4047 (2014). https://doi.org/10.1007/s12206-014-0916-6
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DOI: https://doi.org/10.1007/s12206-014-0916-6