|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Phase-field Modeling of Interaction Between Phase Transformation and Cracking in Shape Memory Ceramics
||Amirreza Lotfolahpour, Mohsen Asle Zaeem
|On-Site Speaker (Planned)
We present a modified phase-field model to investigate the phase transformation and cracking in shape memory ceramics. The chemical free energy is modified to solve a problem of existing models in underestimating the elastic response at the beginning of the stress-strain curve. First, the modified model is tested for microstructure and mechanical response predictions in a super-elastic 3 mol% yttria-stabilized tetragonal zirconia without considering fracture. Then, the interaction between phase transformation and fracture under displacement-controlled loading condition is investigated. The results are validated against experimental results in terms of microstructure and crack path predictions. The proposed model predicts a realistic mechanical response and the experimentally observed microstructure and crack deflection due to the phase transformation. In addition, the model captures the reverse phase transformation, the effect of grain orientation, and the stress drop due to the crack propagation.
||Phase Transformations, Ceramics, Modeling and Simulation