|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Phase-field Modeling and Design of Elastocaloric Effect in Shape Memory Alloys and Composites
||Cheikh Cisse, Mohsen Asle Zaeem
|On-Site Speaker (Planned)
We present the most complete elastoplastic phase-field model for shape memory alloys. It is fully thermo-mechanically coupled via the consideration of latent heat and temperature-dependent energy coefficients, and it can quantitively predict the shape memory effect, pseudoelasticity and thermomechanical training in polycrystalline shape memory alloys. Using this model, we investigate the microstructural change that are responsible for the elastocaloric properties of bulk shape memory alloys such as CulAlBe. It helps understand the relation between the reversible phase transition and the temperature variation during pseudoelasitc cycle, the plastic-induced functional fatigue, and the effects of loading conditions. We also use this model as a design tool to optimize and control the coefficient of performance of NiTi-based shape memory composites via the microarchitecture of the intermetallic phase (composition, volume fraction, shape and aspect ratio).