| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
|
| Presentation Title |
Modeling of Low Temperature Defect Motion in Ni Bicrystals |
| Author(s) |
Jorge L. Acosta, Brian E Schuster, Darren C Pagan, Reilly Knox |
| On-Site Speaker (Planned) |
Jorge L. Acosta |
| Abstract Scope |
Change in metal failure mode with temperature is a long-standing topic of interest due to its ramifications on structural systems and design. New engineering challenges, such as deep-space travel and cryogenic storage, have made understanding this phenomenon more critical than ever. Yet, quantitative understanding of failure event development in metals remains incomplete. In this work, changes in stress transmission and deformation kinetics with respect to temperature were examined for model high-purity Ni bicrystals with an emphasis on low temperatures. To this end, crystal plasticity finite element method simulations were performed using both Neper polycrystal generation and the Finite Element Polycrystal Plasticity (FEPX) software with an emphasis on grain boundary effect. Complementary thermomechanical experiments were performed on small-scale specimens with bicrystal microstructural clones extracted from polycrystalline Ni, with assistance of digital image correlation. Together, these results help build toward a more comprehensive understanding of the development of failure in polycrystalline metals. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Copper / Nickel / Cobalt, Mechanical Properties, Modeling and Simulation |