Constraint effect of corrosion fatigue crack growth behavior in S690 high strength steel

被引：0
|
作者：
Han Y. [1 ,2 ]
Li Z. [1 ,2 ]
Xu L. [1 ,2 ]
Jing H. [1 ,2 ]
Zhao L. [1 ,2 ]
机构：
[1] School of Materials Science and Engineering, Tianjin University, Tianjin
[2] Key Laboratory of Advanced Joining Technology, Tianjin
来源：
Hanjie Xuebao/Transactions of the China Welding Institution | 2018年 / 39卷 / 12期
关键词：
Constraint; Corrosion fatigue; Crack growth; S690 high strength steel;
D O I：
10.12073/j.hjxb.2018390290
中图分类号：
学科分类号：
摘要：
S690 high strength steel was widely used in offshore platforms because of its comprehensive mechanical properties. Corrosion fatigue fracture was easily formed at the offshore platforms, while corrosion fatigue crack growth behavior was significantly affected by seawater corrosion, cyclic loading and constraint effect of the structure. Therefore, the fatigue crack growth rate tests in air and seawater, combining with fracture morphologies analysis, were conducted to investigate the constraint effects of the corrosion fatigue crack growth behavior in S690 high strength steel. The results indicated that the fatigue crack growth rate in seawater was dramatically accelerated by anodic dissolution and hydrogen induced cracking. Meanwhile, the constraint effect on the corrosion fatigue crack growth rate increased with the crack growth. The corrosion fatigue crack growth rate was closely related to the constraint increment before and after the crack growth and the constraint of the structure. © 2018, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.
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页码：13 / 18
页数：5
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