Effect of Grain Boundary Carbides and Cold Work on Stress Corrosion Cracking of Alloy 600

WANG Jiamei; SU Haozhan; CHEN Kai; GUO Xianglong; ZHANG Lefu; WANG Yuanhua; MA Wujiang

doi:10.11973/fsyfh-202204001

Corrosion & Protection > 2022 > 43(4): 1-6. > DOI: 10.11973/fsyfh-202204001

WANG Jiamei, SU Haozhan, CHEN Kai, GUO Xianglong, ZHANG Lefu, WANG Yuanhua, MA Wujiang. Effect of Grain Boundary Carbides and Cold Work on Stress Corrosion Cracking of Alloy 600[J]. Corrosion & Protection, 2022, 43(4): 1-6. DOI: 10.11973/fsyfh-202204001

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Effect of Grain Boundary Carbides and Cold Work on Stress Corrosion Cracking of Alloy 600

1. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
2. Shanghai Xinmin (Dongtai) Heavy Forging Co., Ltd., Suzhou 224200, China

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Received Date: June 11, 2020

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Abstract

The stress corrosion cracking (SCC) behavior of alloy 600 in simulated pressurized water reactor (PWR) high-temperature water environment was investigated by direct current potential drop (DCPD) on-line monitoring. Analytical electron microscopy was utilized to characterize the cracking process to better understand the cold work and grain boundary (GB) carbides effect. Synergistic effect of GB carbides and cold work on SCC behavior was identified. A beneficial effect of carbides was identified in non-cold worked alloy 600, which was attributed to the physical impediment and reduced GB internal oxidation. In cold worked alloy 600, GB carbides had a detrimental effect due to the combination of the enhanced local strain at GBs and also enhanced GB internal oxidation.
- alloy 600,
- carbide,
- cold work,
- stress corrosion cracking,
- crack growth rate

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