|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Computational Thermodynamics and Kinetics
||A Non-Schmid Crystal Plasticity Finite Element Approach to Multi-scale Modeling of Nickel-based Superalloys
||Shahriyar Keshavarz, Andrew Reid, Stephan Langer, Somnath Ghosh
|On-Site Speaker (Planned)
This study develops non-Schmid crystal plasticity constitutive models at two length scales, and bridges them in a multi-scale framework. The constitutive models address thermo-mechanical behavior of Nickel-based superalloys for a large temperature range, viz. 300 Ke1223 K, and include orientation dependencies and tension-compression asymmetry. The orientation dependencies result in tension- compression asymmetry for almost all orientations on the standard unit triangle. However simulations show different trends for the stronger direction (tension or compression) in terms of yield stress and hardening. The multi-scale framework includes two sub-grain and homogenized grain scales. The homogenized model develops functional forms of constitutive parameters in terms of characteristics of the sub-grain two-phase microstructural morphology including precipitates shape, volume fraction and size in the sub-grain microstructure. This homogenized model can significantly expedite crystal plasticity FE simulations due to the parametrized representation, while retaining accuracy.
||Planned: Supplemental Proceedings volume