High-speed visualization and plume characterization of the hybrid spray process |
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Authors: | J Stanisic D Kosikowski P S Mohanty |
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Affiliation: | (1) Additive Manufacturing Process Laboratory (AMPL), University of Michigan—Dearborn, 4901 Evergreen Road, 48188 Dearborn, MI |
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Abstract: | The hybrid spray process that combines arc spray with a high-velocity oxyfuel (HVOF)/plasma jet has recently demonstrated
its effectiveness in deposition of functionally gradient coatings. This approach aims at exploiting the combined attributes
of the arc-spray technique and the HVOF/air plasma spraying (APS) technique. This paper presents high-speed visualization
and plume characterization of an arc/HVOF hybrid spray gun as well as a twin-wire arc-spray gun. The physics of atomization
in the hybrid spray process is examined using a high-speed camera. A DPV/CPS-2000 (Tecnar, St-Bruno, QC, Canada) particle
diagnostics sensor is used to measure particle velocity, temperature, size, and distribution. The influence of feed material,
arc parameters, and HVOF parameters on the particle characteristics is presented. Differences in the in-flight characteristics
between the hybrid and the twin-wire arc process are discussed aided by the observed atomization phenomena with the high-speed
camera.
This article was originally published inBuilding on 100 Years of Success, Proceedings of the 2006 International Thermal Spray Conference (Seattle, WA), May 15–18, 2006, B.R. Marple, M.M. Hyland, Y.-Ch. Lau, R.S. Lima, and J. Voyer, Ed., ASM International, Materials
Park, OH, 2006. |
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Keywords: | arc diagnostics HVOF hybrid gun visualization |
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