|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Algorithm Development in Materials Science and Engineering
||A Phase Field Study of Microstructure Evolution during Additive Manufacturing: Role of Temperature and Viscoplastic Attributes
||Sudipta Biswas, Vikas Yetella, Vikas Tomar
|On-Site Speaker (Planned)
During the additive manufacturing process small powder particles consolidate into a solid polycrystalline structure by reducing the void fraction and over all surface area. In order to understand the densification mechanisms and microstructural evolution during additive manufacturing consideration of rigid body motion along with rate dependent plasticity (viscoplasticity) is of immense importance. Current work focuses on capturing the microstructural changes during selective laser melting type processes using phase field modeling. The finite element based MOOSE framework has been used for implementing the model with special emphasis on rigid body motion along with viscoplastic deformation using the phase field equations. The introduced additional capability not only helps in capturing the sintering process effectively but also improves the numerical convergence of the problem reducing the overall computational cost. Final equilibrium configuration of particles and grain morphology depends on initial stacking of the powder particles, process conditions, loading rate and total process time.
||Planned: Supplemental Proceedings volume