|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||Multiscale Modeling of Coupled Melt Pool Evolution and Solidification Morphology in the LENS Process
||Matthew Rolchigo, Peter Collins, Micheal Mendoza, Richard LeSar
|On-Site Speaker (Planned)
Evolution and solidification of the LENS melt pool are complex and interdependent processes, involving movement of fluid, heat, and solute at various length and time scales. Since as-solidified microstructures play a large role in mechanical property determination, understanding how materials and process parameters can be chosen to produce desired microstructures is critical to utilizing LENS’ full potential. We present work in which heat transport, melting, and fluid flow are modeled at the macroscale via a thermal Lattice Boltzmann model, accounting for laser absorption and Marangoni flow in the melt pool. At the microscale, solidification and solute transport are modeled using a cellular automaton model for binary alloy solidification and information passed from the macroscale. This allows linking among process parameters, melt pool conditions, and microstructure. Modeled solidification morphology as functions of both material/process parameters as well as position in the solidified melt will be examined and compared with experimental results.
||Planned: Supplemental Proceedings volume