|About this Abstract
||MS&T22: Materials Science & Technology
||Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
||Planar and Full-Process Modeling of the Powder-Bed Fusion Ti-6Al-4V Columnar-to-Equiaxed Transition Behavior
||Brodan Richter, Joshua D. Pribe, George R. Weber, Edward H. Glaessgen
|On-Site Speaker (Planned)
Recent advancements in powder-bed fusion (PBF) microstructure simulation using the Monte Carlo technique have enabled increased length- and time-scale simulations. These larger simulations enable the generation of engineering-relevant pseudo-microstructures for use in Process-Structure-Property frameworks to relate processing parameter to final part performance. However, the interaction of solidification alongside the rapid melt pool motion of additive manufacturing creates challenges when validating and calibrating the technique to new alloy systems. This work presents a reduced-scale planar solidification version of the PBF Monte Carlo technique for comparing the simulated columnar-to-equiaxed transition (CET) to experimentally determined CET for Ti-6Al-4V. The influence of modifying the nucleation parameters and dendrite tip velocity on the resulting CET map, grain structure, and texture are shown and compared to simulations of the full-scale PBF model. The results of this work demonstrate a method for the calibration of the PBF Monte Carlo technique for application to new material systems.