|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||2022 Technical Division Student Poster Contest
||SPG-33: Computational Modeling of Non-equilibrium Phenomena in Laser Additive Manufacturing Using Molecular Dynamics
||Gurmeet Singh, Veera Sundararaghavan
|On-Site Speaker (Planned)
Additive manufacturing of a single crystalline metallic column is studied using molecular dynamics simulations. In the model, a melt pool is incrementally added and cooled to a target temperature under isobaric conditions to build a metallic column. We investigated the microstructure evolution of the solidified column and looked at the influence of cooling rate, powder bed temperature, and effect of added inclusion on the defects. The new additions to the code are the use of tight-binding DFT potentials to model multi-component alloy systems and the use of this approach to improve the modeling of laser-atom interactions. Current laser-matter interaction models use two-temperature classical potentials that do not capture the electronic effects accurately. With DFT tight binding dynamics, we study how the laser interacts with various atom types in higher detail. We study the role that inclusions play in reducing or worsening the retained defects in the additive column.
||Additive Manufacturing, Modeling and Simulation, Computational Materials Science & Engineering