|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques II
||In-situ Characterization of Residual Strain Relaxation of Additively Manufactured Inconel 625 through Energy-resolved Neutron Imaging
||Anton Tremsin, Yan Gao, Ade Makinde, Hassina Bilheux, Jean Bilheux, Ke An, Takenao Shinohara, Kenichi Oikawa
|On-Site Speaker (Planned)
The release of residual stresses in Inconel 625 materials during post-build annealing is investigated with the help of neutron imaging. The 25 x 15 x 6 mm3 samples were printed using the powder-bed metal laser melting additive manufacturing technique. With the help of energy-resolved neutron imaging we measure, in-situ, the strain map distribution within as-built samples and during their subsequent stress relief annealing in a vacuum furnace at 700°C and 875°C. Despite the limited accuracy of in-situ lattice strain reconstruction during annealing, the results indicate that most of the strain relaxation occurs at 700°C within 2-3 hours. Relaxation of the strain at 875°C happened at a much faster rate. We also performed simulations of the AM build process to predict the residual stress distributions as a function of the build process parameters. The simulation results are in a good agreement with experiments, confirming their usefulness for simulation validation.
||Additive Manufacturing, Characterization, Modeling and Simulation