Study on Corrosion Fatigue Damage Behavior of Marine High-strength Steel in Seawater Environment
ZHANG Ruonan1, WEI Pengyu2,*, WANG Ke3, ZENG Qingbo2, WANG Lian2, SONG Peilong2
1 Taihu Laboratory of Deepsea Technological Science, Wuxi 214082, Jiangsu, China 2 China Ship Scientific Research Center, Wuxi 214082, Jiangsu, China 3 School of Naval Architecture & Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
Abstract: Corrosion fatigue damage affects the safe service of marine equipment seriously. In order to study the crack propagation law and corrosion fatigue damage mechanism of marine equipment in seawater environment, fatigue crack growth tests in air and seawater environment for marine high-strength steel 10CrNi3MoV were carried out. And the influence of sea water environment on fatigue crack growth rate by comparing different crack growth rates (CGR) and fatigue life in air and seawater environment were analyzed, and the corrosion fatigue behavior history of marine high-strength steel was obtained. Based on the observation of corrosion fatigue fracture morphology and the analysis of corrosion products, the corrosion fatigue damage mechanism of typical marine high-strength steel was revealed. The research results showed that corrosion fatigue damage starts from the pitting corrosion pits on the metal caused by the uneven electrochemical reaction on the surface of the substrate, and gradually evolves into microcracks under the combined action of corrosion and fatigue. Seawater environment has a significant impact on the CGR and fatigue life, significantly accelerating crack propagation and reducing fatigue life. With the increase of the CGR, the influence of mechanical fatigue damage on the crack growth is dominant compared with seawater corrosion. What's more, anodic dissolution with cleavage characteristics is the main mechanism in the corrosion fatigue damage evolution process of marine high-strength steel.
1 Huang X G, Wang L M. Journal of Ship Mechanics, 2016, 20(8), 992 (in Chinese). 黄小光, 王黎明. 船舶力学, 2016, 20 (8), 992. 2 Huang X G, Xu J Q. Chinese Journal of Solid Mechanics, 2013, 34 (1), 7 (in Chinese). 黄小光, 许金泉. 固体力学学报, 2013, 34 (1), 7. 3 Chen T, Nutter J, Hawk J, et al. Corrosion Science, 2014, 89, 146 4 Donahue J R, Burns J T. International Journal of Fatigue, 2016, 91, 79. 5 Chen L Y, Lan H, Huang C B, et al. Materials and Corrosion, 2017, 68(11), 1172. 6 Ebara R. Materials Science and Engineering: A, 2007, 468, 109. 7 Seifert H, Ritter S, Leber H. Corrosion Science, 2012, 59, 20. 8 Wang H, Su B Y, Hua G R, et al. Hot Working Technology, 2016(16), 48(in Chinese). 王恒, 苏波泳, 花国然, 等. 热加工工艺, 2016(16), 48. 9 Turnbull A. Electroanalysis, 2001, 57(2), 175. 10 General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of China. Metallic materials-fatigue testing-fatirue crack growth method, China Standard Press, China, 2017(in Chinese). 中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会. 金属材料疲劳裂纹扩展速率试验方法, 中国标准化出版社, 2017. 11 Wang F, Shu Y H. Oxidation of Metals, 2003, 59, 201. 12 Liu L, Li Y, Wang F H. Science China Technological Sciences, 2012, 55(2), 369. 13 Schrock D J, Akman A M, Locke J S. Corrosion, 2021, 77(3), 287. 14 Zhao T L. Corrosion fatigue crack initiation behaviors and mechanisms of E690 steel in simulated seawater. Ph. D. Thesis, University of Science and Technology Beijing, China, 2018(in Chinese). 赵天亮. E690钢在模拟海水中的腐蚀疲劳裂纹萌生行为及机理研究. 博士学位论文, 北京科技大学, 2018. 15 Guo Q, Liu J H, Yu M, et al. Applied Surface Science, 2015, 327, 313.