|
| Effect of Zinc Injection on Stress Corrosion Cracking Behavior of 316L Stainless Steel Welded Joint |
| Received:October 24, 2024 Revised:December 11, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2025.03.015 |
| KeyWord:stress corrosion cracking crack initiation crack propagation welded joint zinc injection high temperature high pressure water nuclear power plant |
| Author | Institution |
| HE Shao |
China Nuclear Power Technology Research Institute Co., Ltd., Guangdong Shenzhen , China |
| HAN Yaolei |
Suzhou Nuclear Power Research Institute Co., Ltd., Jiangsu Suzhou , China |
| LI Yulong |
China Nuclear Power Technology Research Institute Co., Ltd., Guangdong Shenzhen , China |
| MING Tingyun |
Suzhou Nuclear Power Research Institute Co., Ltd., Jiangsu Suzhou , China |
| SHANG Jianlu |
Suzhou Nuclear Power Research Institute Co., Ltd., Jiangsu Suzhou , China |
| WANG Jiamei |
School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai , China |
| MEI Jinna |
Suzhou Nuclear Power Research Institute Co., Ltd., Jiangsu Suzhou , China |
| ZHU ping |
Suzhou Nuclear Power Research Institute Co., Ltd., Jiangsu Suzhou , China |
| ZHANG Lefu |
School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai , China |
| PENG Qunjia |
Suzhou Nuclear Power Research Institute Co., Ltd., Jiangsu Suzhou , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to study the stress corrosion cracking (SCC) behavior of 316L stainless steel welded joints in high temperature and high pressure water with different Zn injection concentrations, to provide a technical support for Zn injection technology of nuclear power plants. The SCC initiation behavior of a stainless steel welded joint was studied by slow strain rate tensile tests. The SCC propagation behavior in the zinc injection water was compared according to the direct current potential drop (DCPD). Microstructure characteristics of SCC crack initiation locations and propagation paths of welded joints were observed and analyzed by scanning electron microscopy, energy spectrum analysis and electron backscatter diffraction. The SCC crack initiation test results showed that under all zinc injection concentrations in high temperature and high pressure water environments, the cladding metal zone had the most cracks, followed by the heat affected zone, and the fusion line was not cracked. The crack propagation test results showed that the effect of zinc injection on the SCC initiation behavior and propagation behavior of the stainless steel welded joint is insignificant. The crack propagation rate was lower than 8.0×10–8 mm/s (1.6 mm/a). In conclusion, 316L stainless steel welded joints have low stress corrosion cracking sensitivity in different zinc injection concentrations. |
| Close |
|
|
|