|About this Abstract
||Materials Science & Technology 2020
||Additive Manufacturing Modeling and Simulation: AM Materials, Processes, and Mechanics
||Development of Temperature History Profiles for Production of Ti-6Al-4V Using a Semi-Analytical Model
||Lonnie Smith, Amit K Verma, Andrew (Drew) Huck, P. Chris Pistorius, Anthony (Tony) Rollett
|On-Site Speaker (Planned)
Directed energy deposition (DED) is an additive process that uses a laser beam to melt a feed of hot wire, which creates a melt pool on the surface of a metallic substrate. The work here seeks to generate temperature history profiles for layer-wise development of parts built using Ti-6Al-4V (Ti64). By utilizing a modified version of the Rosenthal solution to the moving heat source problem, a simple, semi-analytical model that incorporates system parameters and multiple modes of heat transfer, including convective heat loss, is used to produce plausible temperature history profiles. The results achieved with this model are obtained quickly (in comparison to ANSYS based solutions) and will be used to develop predictions of the fraction of phases that form in the creation of Ti64 parts via DED. Validation of the simulations is achieved by calibrating the model against metallographic information obtained from etching the cross sections of fabricated samples.