| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation-induced Manipulation of Defect Structures and Hierarchical Microstructures
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| Presentation Title |
Microstructural Inelastic Deformation and Fracture Modes in Crystalline Materials |
| Author(s) |
M. Chen, Dongyue Xie, , N. Li, Mohammed A. Zikry |
| On-Site Speaker (Planned) |
M. Chen |
| Abstract Scope |
Interrelated aspects of thermo-mechanical behavior with a specific focus on microstructural characteristics, such as partial and total dislocations densities and grain-boundary (GB) that span the nano to the micro, and how these characteristics affect failure modes, such as fracture nucleation in crystalline materials, will be presented. Recently developed methodologies have been used for a detailed analysis of fracture nucleation and the accurate characterization of intergranular and transgranular crack growth. Criteria for dislocation-density mechanisms and immobilization are directly related to interactions with GB ledges and propagating cracks in polycrystalline aggregates. The effects of interfaces, such as GB blockage, dislocation-density motion, and pileups on fracture nucleation will be discussed. The predictions are validated with micropillar compression experiments to provide further understanding of how defects, such as partial and total dislocation-densities, affect failure nucleation and intergranular and transgranular fracture. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, Mechanical Properties |