|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Validation of Laser Powder Bed Fusion Finite Element Model
||Li Ma, Kevontrez Jones, Jarred Heigel, Brandon Lane, Richard Ricker, Greta Lindwall, Carelyn Campbell, Lyle Levine
|On-Site Speaker (Planned)
The energy that is input from a laser into the part during laser-based powder bed fusion (L-PBF) is focused to a very small spot size and is traversed across the surface of the part at high rate of speed. This leads to extremely high local temperature gradients. These gradients produce complex thermal histories that vary from across the part, generating deleterious microstructure, high residual stress, and defects in the as-built part. Computational models play an important role in the interpretation and prediction of the L-PBD process, however they are challenging to implement due to the complex nature of the L-PBF process.
L-PBF single track scans of Ni-based superalloy plates are modeled with both commercial and in-house developed finite element codes. The simulated temperature, scan track melt pool geometry, and residual stresses are compared to measurements made using high speed in-situ thermography, optical measurements of polished cross-sections, and x-ray diffraction, respectively.
||Planned: Supplemental Proceedings volume