| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defect and Phase Transformation Pathway Engineering for Desired Microstructures
|
| Presentation Title |
Assessment and Design of Complex Microstructural Features in Zirconia Shape Memory Ceramics via Elasto-Plastic Phase-field Modeling |
| Author(s) |
Cheikh Cissé, Mohsen Asle Zaeem |
| On-Site Speaker (Planned) |
Cheikh Cissé |
| Abstract Scope |
Shape memory ceramics have large transformation temperature windows in the range 0-500 oC, which is appealing for various engineering applications. However, the lack of comprehensive understating of their microstructure-controlled thermomechanical response have hindered their further developments and applications. In this work, we present the most complete and fully thermomechanically coupled phase-field model to quantitively predict the microstructure-controlled pseudoelasticity and shape memory responses of stabilized zirconia. The model has been used to analyze the reversible monoclinic-to-tetragonal phase transition in zirconia-based shape memory ceramics. This model considers the suppressive effects of grain boundaries on the phase transformation, the pernicious effects of plastic deformation on the shape recovery, the effects of grain orientations on the degree of transformation, the effects of microvoids on the mechanical response, and the interaction of microcracks with the phase transformation during reversible transformation. The proposed model can guide designing the microstructures of shape memory ceramics. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Computational Materials Science & Engineering, Ceramics |