|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Identifying Critical Variables for Laser Powder Bed Fusion
||Li Ma, Brandon Lane, Shawn Moylan, Jeffrey Fong, James Filliben, Carelyn Campbell, Lyle Levine
|On-Site Speaker (Planned)
In laser-based powder bed fusion (L-PBF), the highly localized laser power input leads to extremely high local temperature gradients. These gradients produce complex thermal histories that vary from place to place, effecting the distribution of phases and localized residual stress in the as-built microstructure. In this research, 3D thermal-mechanical finite element analysis (FEA) models of L-PBF were developed. The temperature history and gradient predictions from the FEA thermal modeling are used for microstructure evolution simulations. Temperature distributions from in-situ thermography, melt pool geometry from microscope measurement, and residual stress from the x-ray measurements are used to validate the FEA models. The measurement and control of all possible material properties and processing parameters is challenging and resource consuming. We applied a computational design of experiments approach to investigate the sensitivity of the build process to numerous material and processing parameters.
||Planned: Supplemental Proceedings volume