Comparative study on corrosion fatigue behaviour of high strength low alloy steel and simulated HAZ microstructures in a simulated marine atmosphere

被引：40
|
作者：
Ma, Hongchi [1 ,2 ]
Zhao, Jinbin [2 ]
Fan, Yi [2 ]
Huang, Yunhua [1 ]
Liu, Zhiyong [1 ]
Du, Cuiwei [1 ]
Li, Xiaogang [1 ]
机构：
[1] Univ Sci & Technol Beijing, Natl Mat Corros & Protect Data Ctr, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
[2] Nanjing Iron & Steel United Co Ltd, Nanjing 210035, Jiangsu, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2020年 / 137卷
关键词：
High-strength low-alloy (HSLA) steel; Heat-affected zone (HAZ); Corrosion fatigue; Prior austenite grain boundary (PAGE); Marine atmosphere; HEAT-AFFECTED ZONE; MARTENSITE-AUSTENITE CONSTITUENT; GRAIN-BOUNDARY MISORIENTATION; CRACK INITIATION; STRESS-CORROSION; PIPELINE STEEL; E690; STEEL; HYDROGEN EMBRITTLEMENT; PROPAGATION BEHAVIOR; SCC BEHAVIOR;
D O I：
10.1016/j.ijfatigue.2020.105666
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In this study, corrosion fatigue (CF) behaviour of E690 steel and simulated heat-affected zone (HAZ) microstructures were investigated in a SO2-polluted marine atmosphere. Results revealed that E690 steel and simulated HAZ microstructures were all susceptible to CF cracking in this environment with transgranular fracture. CF cracks were prone to initiate from prior austenite grain boundaries (PAGBs) for parent metal and coarsegrained HAZ (CGHAZ), whereas few microcracks were induced for fine-grained HAZ (FGHAZ). CGHAZ exhibits inferior CF behaviour due to coarse PAGBs and long bainitic lath, whereas FGHAZ exhibits superior CF behaviour because of fine grain size and bainitic lath.
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页数：11
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