Investigation of Fatigue Crack Propagation Behavior on the Surface of Machining Notches of Alloy 690TT in Simulated Pressurized Water Reactor Water

被引：1

作者：

Fu, Zhenghong ^{[1
]}

Gou, Guoqing ^{[1
]}

Xiao, Jun ^{[2
]}

Qiu, Shaoyu ^{[2
]}

Liu, Jinyun ^{[3
]}

Zha, Wusheng ^{[3
]}

Wang, Wanjing ^{[4
]}

Yang, Yuping ^{[5
]}

机构：

[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Chengdu 610031, Sichuan, Peoples R China

[2] Nucl Power Inst China, Natl Key Lab Nucl Fuel & Mat, Chengdu 610041, Sichuan, Peoples R China

[3] Xihua Univ, Sch Mat Sci & Engn, Chengdu 610039, Sichuan, Peoples R China

[4] CRRC Qingdao Sifang Co Ltd, Qingdao 266000, Peoples R China

[5] EWI, Columbus, OH 43221 USA

来源：

CORROSION | 2017年 / 73卷 / 10期

关键词：

Alloy; 690TT; crack growth rates; fatigue crack propagation; pressurized water reactor water; propagation paths; STRESS-CORROSION CRACKING; GROWTH-BEHAVIOR; 690(TT);

D O I：

10.5006/2344

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 degrees 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.

引用

页码：1258 / 1267

页数：10

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