Melt pool imaging using a configurable architecture additive testbed system

Joseph N. Zalameda; Samuel J. A. Hocker; Joshua M. Fody; Wesley A. Tayon

doi:10.1117/12.2585791

12 April 2021 Melt pool imaging using a configurable architecture additive testbed system

Joseph N. Zalameda, Samuel J. A. Hocker, Joshua M. Fody, Wesley A. Tayon

Proceedings Volume 11743, Thermosense: Thermal Infrared Applications XLIII; 117430E (2021) https://doi.org/10.1117/12.2585791
Event: SPIE Defense + Commercial Sensing, 2021, Online Only

Abstract

This paper describes the inline (coaxial to laser) near infrared (NIR) camera sensor on the Configurable Architecture Additive Testbed (CAAT). The CAAT is an instrument that provides the capability to investigate laser based additive manufacturing (AM) processes and is configured for the metal powder bed fusion process. A low cost NIR camera is radiometrically calibrated to obtain coaxial, inline, imagery of laser generated melt pools. The camera capabilities, system optical path, and the uncertainty in the temperature measurement from NIR surface area scans on a bare titanium alloy plate are presented and discussed. The surface radiance measurements are compared to optical microscopy images of the melt pool width and depth. A metallic additive manufacturing process thermal model is developed in order to predict thermal distributions during laser scanning. The predicted thermal distributions by the model for different configurations are compared to the coaxial NIR measurements and discussed.

Conference Presentation

Citation Download Citation

Joseph N. Zalameda, Samuel J. A. Hocker, Joshua M. Fody, and Wesley A. Tayon "Melt pool imaging using a configurable architecture additive testbed system", Proc. SPIE 11743, Thermosense: Thermal Infrared Applications XLIII, 117430E (12 April 2021); https://doi.org/10.1117/12.2585791

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