22 May 2013 Thermal imaging for assessment of electron-beam freeform fabrication (EBF3) additive manufacturing deposits
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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, Joseph N. Zalameda, Eric R. Burke, Eric R. Burke, Robert A. Hafley, Robert A. Hafley, Karen M. Taminger, Karen M. Taminger, Christopher S. Domack, Christopher S. Domack, Amy Brewer, Amy Brewer, Richard E. Martin, 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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