About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Defects and Interfaces: Modeling and Experiments
|
Presentation Title |
Microstructural Induced Defects and Failure Modes in Crystalline Materials |
Author(s) |
Muh-Jang Chen, Dongyue Xie, Nan Li, Mohammed A. Zikry |
On-Site Speaker (Planned) |
Muh-Jang Chen |
Abstract Scope |
The Interrelated aspects of thermo-mechanical behavior with a specific focus on microstructural characteristics and defects, 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 and provide further understanding how defects, such as partial and total dislocation-densities, affect failure nucleation and intergranular and transgranular fracture. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Mechanical Properties, Characterization |