About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation-induced Microstructural Evolution during Solid Phase Processing: Experimental and Computational Studies
|
| Presentation Title |
Hybrid Rate Theory Model: Alternative Approach for Analysis of Radiation-induced Growth |
| Author(s) |
Mahdi Mohsini, Peyman Saidi, Mark R. Daymond |
| On-Site Speaker (Planned) |
Mahdi Mohsini |
| Abstract Scope |
Diffusivity difference of radiation products in prismatic and basal planes of Zirconium unit cell results in phenomena such as irradiation-induced growth and creep. Diffusional Anisotropy Difference (DAD), which suggests dissimilar rates of diffusion for individual vacancies and interstitials in basal and prismatic planes. An alternative mechanism, Self-Interstitial Cluster Diffusion (SICD), relates the growth to the formation of self-interstitial clusters which diffuse solely along the <a> direction. Due to limitations of both models, we propose a model, in which limitations have been solved. In this model, the combination of point defects and SIA clusters exist and diffuse to the sinks in the bulk and dislocation loops in the prism planes, respectively. Furthermore, the bias factor is considered for the cases of annealed polycrystals and cold worked polycrystals to expand the generalizability of the model. Consequently, the sinks of grain boundaries and the enhanced dislocation density due to cold work were captured. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Characterization |