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| Effects of Impact on the Fretting Wear Behavior of Steam Generator Tubes |
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| DOI：10.7643/issn.1672-9242.2022.12.015 |
| KeyWord:steam generator fretting wear impact-sliding high temperature steam |
| Author | Institution |
| MEI Jin-na |
Suzhou Nuclear Power Research Institute, Jiangsu Suzhou , China |
| HAN Yao-lei |
Suzhou Nuclear Power Research Institute, Jiangsu Suzhou , China |
| WANG Peng |
Suzhou Nuclear Power Research Institute, Jiangsu Suzhou , China |
| CAI Zhen |
Suzhou Nuclear Power Research Institute, Jiangsu Suzhou , China |
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| Abstract: |
| The work aims to study the effects of impact on the fretting wear behavior of steam generator (SG) tubes in the nuclear power plants. Comparative tests of impact-sliding and pure sliding fretting wear were performed in the high temperature and high pressure steam to investigate the effects of impact on the fretting ear behavior of 690TT alloy SG tubes. By analyzing the difference of the microscopic damage structures and comparing the test results of low wear work and high wear work, the role of impact on fretting wear was clarified, and the impact-sliding fretting wear mechanism of the tubes was obtained. In high temperature and high pressure steam, compared with the pure sliding fretting wear, the impact-sliding fretting wear showed dominate characteristics of delamination without obvious furrow wear, indicating a delamination wear mechanism. The higher the wear work, the more the fallen-off wear debris layer and the matrix cracking caused by the impact, and the more serious the impact-sliding fretting wear. Impact changes the fretting wear behavior of SG tubes significantly. Accordingly, the different wear conditions of pure sliding and impact-sliding should be fully considered during the service assessment of SG tubes. |
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