About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Systems for the Future of Fusion Energy
|
Presentation Title |
N-27: Polycrystal Homogenization Modelling Accounting for Channeling in Irradiated Metals and Alloys |
Author(s) |
Diogo Gonçalves, Maxime Sauzay, Laurent Dupuy |
On-Site Speaker (Planned) |
Diogo Gonçalves |
Abstract Scope |
The effects of irradiation on the microstructure of metallic materials have been widely reported in the literature. Irradiation defects lead to a meaningful increase in yield stress and ultimate strength, a decrease in the work-hardening rate and a decrease in ductility. Finally, the intense plastic slip localization within thin slip bands called "channels" is often reported. A polycrystalline homogenization model accounting for the production of channels inside grains is proposed, as observed experimentally in irradiated ferritic and tempered ferritic-martensitic steels. All material parameters are issued from experimental observations (SEM, TEM), dislocation dynamic calculations and single crystal tensile curves, avoiding any inverse fitting using experimental polycrystalline curves. Due to the low channel aspect ratio, weak internal stresses inside irradiated polycrystals are obtained, and the predictions are in good agreement with experimental observations (very low strain-hardening and low number of activated slip systems). |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Nuclear Materials, Iron and Steel |