|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Microstructure Variation and Process Model Developments For LENS
||Josh Sugar, Lauren Beghini, Michael Stender, Michael Veilleux, David Keicher, Daryl Dagel, Michael Maguire, Chris San Marchi
|On-Site Speaker (Planned)
The optimized design and qualification of additively manufactured components requires that the fundamental physics underlying the heat transport during the rapid solidification and subsequent cyclic heating of parts be understood. The thermal gradients present during these AM processes, such as LENS, will impact the microstructure (e.g. grain size/texture, ferrite distribution, dislocation structure) and properties (e.g. tensile strength, residual stress) of these materials. Here, we will show how varying process parameters such as laser raster pattern, laser speed, and laser power affects the microstructure of resultant LENS-built parts. In addition, developments to a LENS process model that incorporates the physics of heat transport during LENS processing will be presented. The predictions of the process model are validated by in situ thermal measurements. The importance of robust process models to optimize the design and performance of parts built with LENS is also discussed.
||Planned: Supplemental Proceedings volume