Thermal imaging for assessment of electron-beam freeform fabrication (EBF3) additive manufacturing deposits

Joseph N. Zalameda; Eric R. Burke; Robert A. Hafley; Karen M. Taminger; Christopher S. Domack; Amy Brewer; Richard E. Martin

doi:10.1117/12.2018233

22 May 2013 Thermal imaging for assessment of electron-beam freeform fabrication (EBF³) additive manufacturing deposits

Joseph N. Zalameda, Eric R. Burke, Robert A. Hafley, Karen M. Taminger, Christopher S. Domack, Amy Brewer, Richard E. Martin

Author Affiliations +

Proceedings Volume 8705, Thermosense: Thermal Infrared Applications XXXV; 87050M (2013) https://doi.org/10.1117/12.2018233
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

Additive manufacturing is a rapidly growing field where 3-dimensional parts can be produced layer by layer. NASA’s electron beam freeform fabrication (EBF³) technology is being evaluated to manufacture metallic parts in a space environment. The benefits of EBF³ technology are weight savings to support space missions, rapid prototyping in a zero gravity environment, and improved vehicle readiness. The EBF³ system is composed of 3 main components: electron beam gun, multi-axis position system, and metallic wire feeder. The electron beam is used to melt the wire and the multi-axis positioning system is used to build the part layer by layer. To insure a quality deposit, a near infrared (NIR) camera is used to image the melt pool and solidification areas. This paper describes the calibration and application of a NIR camera for temperature measurement. In addition, image processing techniques are presented for deposit assessment metrics.

Citation Download Citation

Joseph N. Zalameda, Eric R. Burke, Robert A. Hafley, Karen M. Taminger, Christopher S. Domack, Amy Brewer, and Richard E. Martin "Thermal imaging for assessment of electron-beam freeform fabrication (EBF³) additive manufacturing deposits", Proc. SPIE 8705, Thermosense: Thermal Infrared Applications XXXV, 87050M (22 May 2013); https://doi.org/10.1117/12.2018233

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