Effect of particle impact on residual stress development in HVOF sprayed coatings |
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Authors: | P Bansal P H Shipway S B Leen |
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Affiliation: | (1) School of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, NG7 2RD University Park, Nottingham, U.K. |
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Abstract: | The application of thick high-velocity oxyfuel (HVOF) coatings on metallic parts has been widely accepted as a solution to
improve their wear properties. The adherence of these coatings to the substrate is strongly influenced by the residual stresses
generated during the coating deposition process. In an HVOF spraying process, due to the relatively low processing temperature,
significant peening stresses are generated during impact of molten and semimolten particles on the substrate. At present,
finite-element (FE) models of residual stress generation for the HVOF process are not available due to the increased complexities
in modeling the stresses generated due to the particle impact. In this work, an explicit FE analysis is carried out to study
the effect of molten particle impingement using deposition of an HVOF sprayed copper coating on a copper substrate as an example
system. The results from the analysis are subsequently used in a thermomechanical FE model to allow the development of the
residual stresses in these coatings to be modeled.
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: | copper finite element high-velocity oxyfuel particle impact residual stress |
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