| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Radiation-induced Segregation in Nanocrystalline FeCrNi under Concurrent Grain Boundary Movement |
| Author(s) |
Aashique Alam Rezwan, Yongfeng Zhang |
| On-Site Speaker (Planned) |
Aashique Alam Rezwan |
| Abstract Scope |
Irradiation of crystalline materials modifies the microchemistry and microstructure, including solute segregation towards defect sinks such as grain boundaries (GBs), known as radiation-induced segregation (RIS). Unlike coarse-grained alloys, where GBs are nearly static, RIS in nanocrystalline is accompanied and affected by concurrent grain growth, either thermal or irradiation induced. This talk presents a phase-field study of concurrent RIS and grain growth in austenitic Fe-Cr-Ni. It is found that the overall RIS is grain size-dependent and increases with increasing grain size. The segregation profile is asymmetrical, with Cr depleted behind and enriched in front of a moving GB. This leads to a heterogenous Cr distribution, depleted in growing and enriched in shrinking grains. These findings highlight different effects of RIS in nanocrystalline alloys than those in their coarse-grained counterparts. |
| Proceedings Inclusion? |
Undecided |