Understanding Subsurface Behavior and Defect Formation During Laser Material Interactions Via Coupled In Situ X-Ray and Optical Probes

Executive Summary

This project will use in situ x-ray experiments paired with optical monitoring to improve our understanding of subsurface materials behavior during laser materials processing techniques. This understanding will improve these techniques and enable rapid, science-based qualification of parts produced by laser materials processing, solving important challenges for both stockpile stewardship and American industrial competitiveness.

Publications, Presentations, and Patents

Calta, Nicholas. “Linking Laser Melting Phenomena to Process Monitoring Signatures with X-Ray and Optical Imaging.” Presented at the TMS Annual Meeting. Anaheim, CA. February 28, 2022.

Calta, Nicholas. “Using Process Monitoring Signals to Identify Defects during Laser Powder Bed Fusion.” Presented at the Solid Freeform Fabrication Symposium. Austin, TX. July 25. 2022.

Gorgannejad, Sanam. “Process Monitoring for Pore Detection Using in Situ X-Ray Imaging and Diagnostic Signals.” Presented at the Solid Freeform Fabrication Symposium. Austin, TX. July 27, 2022.

Martin, Aiden A., Jenny Wang, Philip J. DePond, Maria Strantza, Jean-Baptiste Forien, Sanam Gorgannejad, Gabriel M. Guss, et al. 2022. “A Laser Powder Bed Fusion System for Operando Synchrotron X-Ray Imaging and Correlative Diagnostic Experiments at the Stanford Synchrotron Radiation Lightsource.” Review of Scientific Instruments 93 (4): 043702. https://doi.org/10.1063/5.0080724.