The fatigue crack propagation behavior on the surface of machining notches of Alloy 690TT (thermally treated) was investigated in room-temperature air environment and in simulated pressurized water reactor (PWR) environment with saturated air at 325°C. The results showed that more than one crack formed on the notch surface and the crack propagation paths were transgranular with some branching. The grain size also had some effect on the crack propagation path but had no significant effects on the crack growth rates (CGRs). The CGR vs. a curve could be divided into two stages in air environment and three stages in simulated PWR environment. The corrosive environment promotes crack propagation in the macroscopic crack propagation stage. Different load frequencies express similar crack propagation process, but decreasing frequency can assist the corrosion fatigue crack nucleation and propagation on the notch surface.
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1 October 2017
Research Article|
June 03 2017
Investigation of Fatigue Crack Propagation Behavior on the Surface of Machining Notches of Alloy 690TT in Simulated Pressurized Water Reactor Water Available to Purchase
Zhenghong Fu;
Zhenghong Fu
*School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
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Guoqing Gou;
Guoqing Gou
‡
*School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
‡Corresponding author. E-mail: [email protected].
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Jun Xiao;
Jun Xiao
**National Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, Chengdu 610041, China.
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Shaoyu Qiu;
Shaoyu Qiu
**National Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, Chengdu 610041, China.
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Jinyun Liu;
Jinyun Liu
***School of Material Science and Engineering, Xihua University, Chengdu 610039, China.
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Wusheng Zha;
Wusheng Zha
***School of Material Science and Engineering, Xihua University, Chengdu 610039, China.
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Wanjing Wang;
Wanjing Wang
****CRRC Qingdao Sifang Co., Ltd., Qingdao 266000, China.
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Yuping Yang
Yuping Yang
*****EWI, Columbus, OH 43221.
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‡Corresponding author. E-mail: [email protected].
Online ISSN: 1938-159X
Print ISSN: 0010-9312
© 2017, NACE International
2017
CORROSION (2017) 73 (10): 1258–1267.
Citation
Zhenghong Fu, Guoqing Gou, Jun Xiao, Shaoyu Qiu, Jinyun Liu, Wusheng Zha, Wanjing Wang, Yuping Yang; Investigation of Fatigue Crack Propagation Behavior on the Surface of Machining Notches of Alloy 690TT in Simulated Pressurized Water Reactor Water. CORROSION 1 October 2017; 73 (10): 1258–1267. https://doi.org/10.5006/2344
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