| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Components
|
| Presentation Title |
Effect of Cr Concentration On <111> and <100> Dislocation Loop Formation in Fe-Cr Alloys |
| Author(s) |
Yaxuan Zhang, Ziqi Xiao, Xian-Ming Bai |
| On-Site Speaker (Planned) |
Xian-Ming Bai |
| Abstract Scope |
Radiation can produce both 1/2<111> and <100> type interstitial dislocation loops in Fe-based ferritic alloys. They can hinder the dislocation motion and lead to radiation hardening. Although the observation of the two loop types in Fe-Cr alloys has been widely reported, contradictory experimental results exist in terms of the Cr effect on their relative abundance, partially because different irradiation conditions and characterization methods were used. In this work, we use molecular dynamics simulations to study the effects of Cr concentration on the relative abundance of two types of loops in Fe-Cr alloys. Our results show that the formation probability of <100> type of loops decreases significantly with the increasing Cr concentration while that of 1/2<111> type of loops is less affected. Our independent molecular statics calculations show that Cr can suppress <100> loop formation more strongly than 1/2<111> loops. The possible effects of other alloying elements are also discussed. |
| Proceedings Inclusion? |
Planned: |