| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Modeling and Experimental Characterization of Intragranular Residual Stresses, Statistically Stored and Geometrically Necessary Dislocations |
| Author(s) |
Ritwik Bandyopadhyay, Sven E. Gustafson, Hemant Sharma, Peter Kenesei, Michael D. Sangid |
| On-Site Speaker (Planned) |
Ritwik Bandyopadhyay |
| Abstract Scope |
Residual stress, defined as long-range internal stress inside a solid in the absence of externally applied load, is present in all engineering materials. In crystalline solids, such stress primarily exists due to defects (e.g., point defects, dislocations and dislocation structures, precipitates, grain boundaries) and can influence the performance of structural components. However, there are limited methods to initialize intragranular residual stress and dislocation densities in crystal plasticity models. This research lays out a mathematical framework to compute statistically stored and geometrically necessary dislocations and their contributions to intragranular residual stress. We test the efficacy of the framework using near-field and far-field high-energy x-ray microscopy experimental data for Ti-7Al. Good agreement between model prediction and experimental observations adds trust to our formulation. The proposed framework offers a path to better characterize structure-performance relationships in designing materials using an integrated computational materials engineering (ICME) approach. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, Other |