About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Enabling Micro-Thermomechanical Modelling Using a Novel Continuous-Wave Laser and SEM Coupling |
| Author(s) |
Nikhil Mohanan, Juan Guillermo Santos Macías, Thomas Helfer, Jérémy Bleyer, Manas V. Upadhyay |
| On-Site Speaker (Planned) |
Manas V. Upadhyay |
| Abstract Scope |
Predicting micro-thermomechanical fields during laser-matter interactions is important to understand subsequent local behavior of additively manufactured (AM) metals. Due to the difficulty to experimentally probe such fields during lasering, polycrystalline models have been developed to gain deeper insights. However, their predictive capability is typically compared against AM builds that do not resemble the correct geometry and are subjected to uncontrolled boundary conditions. To overcome this problem, a novel coupling between a continuous-wave (CW) laser and a scanning electron microscope (SEM)–CW Laser-SEM–was developed. It enables laser processing under AM-relevant conditions, within a controlled environment, eliminating oxidation and allowing SEM-based pre- and post-laser characterization at identical locations without mechanical polishing. Single-pass lasering experiments on AM 316L were performed to provide clean input and validation data for a thermo-elasto-viscoplastic polycrystal model. Simulation validation and predictions (local residual stresses up to 1.6 GPa and plastic strains up to 4%) will be presented. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |