|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Computational Thermodynamics and Kinetics
||Microstructure Evolution and Deformation Behavior of Powder Materials during Sintering
||Sudipta Biswas, Vikas Tomar
|On-Site Speaker (Planned)
Sintering is an advanced manufacturing technique that compacts small powder particles into a solid polycrystalline structure by reducing the void fraction and surface area. Diffusion as well as plastic deformation facilitates the powder compaction process improving the density of the material. Current work focuses on capturing the microstructural changes during the sintering process and it’s impact on the deformation behavior of the material. Phase field modeling approach has been adopted for apprehending the microstructural evolution during the process in combination with the temperature and stress field. Additionally, Chaboche’s viscoplastic deformation model has been incorporated to observe the impact of plastic flow and creep behavior during the process. It has been observed that initially powder compaction is governed by surface diffusion; however as the applied stress exceeds yield strength of the material plastic flow accelerates the densification process. In addition, grain growth due to grain boundary diffusion also occurs during sintering.
||Planned: Supplemental Proceedings volume