22 May 2013 Thermal imaging for assessment of electron-beam freeform fabrication (EBF3) additive manufacturing deposits
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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.
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Joseph N. Zalameda, Eric R. Burke, Robert A. Hafley, Karen M. Taminger, Christopher S. Domack, Amy Brewer, 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); doi: 10.1117/12.2018233; https://doi.org/10.1117/12.2018233
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