| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Thermodynamics and Kinetics
|
| Presentation Title |
Compositional Patterning and Morphological Evolutions in Binary and Ternary Alloys Driven by Irradiation |
| Author(s) |
Pascal Bellon, Anoop Rama Damodaran, Daniel Schwen, Robert S Averback |
| On-Site Speaker (Planned) |
Pascal Bellon |
| Abstract Scope |
The dynamical competition between irradiation-induced atomic mixing and thermally activated decomposition can induce the self-organization of the composition field into patterns. Analytical modeling and atomistic simulations works showed that a key requirement for this self-organization is that the forced mixing takes place at a finite range exceeding the characteristic range of diffusional jumps. We extend past kinetic Monte-Carlo approaches to multi-component alloy systems, and we investigate the effects of composition-dependent atomic mobility. In the case of slow solute mobility, it is shown that precipitates stabilized by irradiation may develop a "cherry-pit" structure. In the case of ternary and quaternary alloys, we show that, compared to binary alloys, several new nanostructures can be stabilized, in particular core-shell precipitates. These results will be contrasted with available experimental results. |
| Proceedings Inclusion? |
Definite: A CD-only volume |