About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing: Advanced Characterization With Synchrotron, Neutron, and In Situ Laboratory-scale Techniques IV
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| Presentation Title |
Two-color thermography of welding-based processes to enable real-time hardness prediction |
| Author(s) |
Gala C. Solis, Alexander J. Myers, Guadalupe Quirarte, Barnali Mondal, Jonathan A. Malen, Sneha P. Narra |
| On-Site Speaker (Planned) |
Gala C. Solis |
| Abstract Scope |
Process monitoring and model validation are essential for improving weld quality in welding-based additive manufacturing. This work demonstrates an accessible two-color thermal imaging technique using a commercial color camera to enable accurate in-situ temperature measurements with reduced sensitivity to emissivity variations across the dynamic melt pool. High dynamic range images were captured at various exposure times, with spatial and temporal filtering to suppress plasma arc interference. The resulting thermal distributions were used to estimate melt pool cooling rates, which were correlated to ex-situ hardness measurements. A strong relationship was observed between cooling rates ranging from 20 to 600 K/s and hardness values between 250 and 400 HV, demonstrating the ability of this non-destructive, non-contact thermal monitoring approach to predict mechanical properties. Beyond its relevance for real-time process monitoring and early-stage mechanical property evaluation, this technique enhances validation of physics-based models, supporting predictive frameworks for defect formation mechanisms such as porosity. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Characterization |