About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Materials Science and Engineering of Materials in Nuclear Reactors
|
Presentation Title |
E-40: Origin of Hardening in Spinodally-decomposed Fe-Cr Binary Alloys |
Author(s) |
Tomoaki Suzudo, Takeshi Toyama, Yoshiyasu Nagai |
On-Site Speaker (Planned) |
Tomoaki Suzudo |
Abstract Scope |
Spinodal decomposition in thermally aged Fe-Cr binary alloys leads to significant hardening, which is the direct cause of the so-called 475C-embrittlement. Our previous study has discovered that the hardness scales linearly with short-range-order parameter; this suggests that Cr-Cr neighboring pairs formed by phase separation cause hardening. To understand the atomistic origin of hardening, we conducted a series of numerical simulations, in which an edge dislocation interacts to spinodally-decomposed structure. By removing specified Cr-Cr pairs from the system, we investigated the contribution of these Cr-Cr pairs to hardening. The result indicated that Cr-Cr pairs either cut or compressed by the moving dislocation significantly contribute hardening, and the influence from the remaining pairs is minor. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |