|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Algorithm Development in Materials Science and Engineering
||Phase Field Modeling of Microstructure Evolution During Selective Laser Sintering and Post Aging
||Yulan Li, Erin I Barker, William S Rosenthal, Francesca C Grogan, Amra Peles
|On-Site Speaker (Planned)
Phase field models have been developed to simulate the microstructure evolution during selective laser sintering (SLS) process and post aging, respectively. As one of the fastest growing additive manufacturing techniques, the SLS uses a laser as the power source to sinter powdered material into a solid structure. In this work, we aim to investigate the effects of (1) the feedstock powder particle size distribution and packing and (2) the SLS process parameters such as temperature and temperature gradient on microstructures of the resulting component. The microstructure evolution during post aging in terms of pore structure and porosity volume fraction is simulated as well. Polymer nylon–12 is taken as the model material. Surface diffusion and condensation through particle surface melting and rigid movement dominate the sintering process while bulk diffusion and interfacial energy minimization determine the pore structure during aging. Discussion on comparison between simulations and experimental measurements will be presented.
||Planned: Supplemental Proceedings volume