| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Long-term Performance of High-Cr, Nickel-based Alloys and Weldments in LWR Environment |
| Author(s) |
Bogdan Alexandreanu, Yiren Chen, Xuan Zhang, Wei-Ying Chen |
| On-Site Speaker (Planned) |
Bogdan Alexandreanu |
| Abstract Scope |
The thermal stability of high-Cr Ni-based alloys is a potential concern for the long-term performance of nuclear plants and possibly spent fuel storage containers. Many existing commercial nuclear power reactors expected to operate beyond 80 years use these alloys extensively. Extensive stress corrosion cracking (SCC) testing conducted over the last decade has found that, in fact, the weldments – especially in first layer/weld butter/weld overlay configurations – could be as susceptible to SCC as the low-Cr weldments even in their non-aged condition. In order to study the effects of aging on weldments, an Alloy 152 dissimilar metal weld (DMW) joining Alloy 690 and Alloy was aged over the last decade at three different temperatures (370, 400 and 450˚C) for up to 75,000h, corresponding to 60 years of service. The purpose of this paper is to present the effects of aging on microstructure and SCC behavior of these alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Other, Other |