|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
||Implementation of a Multi-physics Model for Simulating Microstructural Evolution during Sintering
||Sudipta Biswas, Daniel Schwen, Hao Wang, Vikas Tomar
|On-Site Speaker (Planned)
We present a multiphysics model for capturing the microstructure evolution of powder materials during sintering. We employ a phase field modeling based approach to predict the mechanisms leading to morphological changes and consider additional physical phenomenon using rigid body motion, elastic deformation and heat conduction coupling. Consolidation of powder particles during sintering is result of two competing mechanisms – mass diffusion and grain boundary migration. Additionally, material undergoes three distinct stages during the process– stage I where neck or grain boundary formation occurs, stage II in which neck length stabilizes and growth or shrinkage of particles initiates and finally stage III with rapid grain growth leading to disappearance of one of the grains. Variation in temperature significantly influences this microstructural behavior. Furthermore, application of the model to sintering of spherical tungsten particles reveals that due to higher curvature, material exhibits faster evolution in 3D as compared to 2D simulations.
||Planned: Supplemental Proceedings volume