About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments IV
|
| Presentation Title |
Phase-Field Modeling of Nanotwin Evolution and Grain Boundary Interactions in Ni-Based Alloys |
| Author(s) |
Yixi Shen, Irene Beyerlein |
| On-Site Speaker (Planned) |
Yixi Shen |
| Abstract Scope |
Nanotwins (NT) are fine defect structures that commonly form in sputtered face centered cubic materials with low stacking fault energy. During NT material fabrication, rapid solidification frequently induces significant residual stresses and strains, which can potentially affect microstructural evolution during subsequent annealing. To systematically study this behavior, we developed an anisotropic phase field model that incorporates elastic energy and thermal gradients. The model is used to investigate the influence of annealing temperatures and residual stresses on detwinning in Ni-based NT materials. The effects of nanotwin thickness, twin boundary energies, and grain boundary energies on the interactions between nanotwins and grain boundaries are also explored. These insights will improve understanding of the stability of sputtered Ni-based NT materials with respect to fabrication conditions and subsequent exposure to temperature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Thin Films and Interfaces, Copper / Nickel / Cobalt |