Mathematical modelling of Inconel 718 particles in HVOF thermal spraying
Mathematical modelling of Inconel 718 particles in HVOF thermal spraying
High velocity oxygen fuel (HVOF) thermal spray technology is able to produce very dense coating without over-heating powder particles. The quality of coating is directly related to the particle parameters such as velocity, temperature and state of melting or solidification. In order to obtain this particle data, mathematical models are developed to predict particle dynamic behaviour in a liquid fuelled high velocity oxy-fuel thermal spray gun. The particle transport equations are solved in a Lagrangian manner and coupled with the three-dimensional, chemically reacting, turbulent gas flow. The melting and solidification within particles as a result of heat exchange with the surrounding gas flow is solved numerically. The in-flight particle characteristics of Inconel 718 are studied and the effects of injection parameters on particle behavior are examined. The computational results show that the particles smaller than 10 ?m undergo melting and solidification prior to impact while the particle larger than 20 ?m never reach liquid state during the process.
CFD, HVOF, gas dynamics, particle modeling
2715-2724
Kamnis, S.
3ca869e0-8c18-4454-94f6-7fb4d2defa23
Gu, Sai.
8ee82ba4-0b78-4a99-ad41-2beffd7b04dc
Zeoli, N.
bce8f101-8e08-4291-af2a-8ed2c2da7b5b
2008
Kamnis, S.
3ca869e0-8c18-4454-94f6-7fb4d2defa23
Gu, Sai.
8ee82ba4-0b78-4a99-ad41-2beffd7b04dc
Zeoli, N.
bce8f101-8e08-4291-af2a-8ed2c2da7b5b
Kamnis, S., Gu, Sai. and Zeoli, N.
(2008)
Mathematical modelling of Inconel 718 particles in HVOF thermal spraying.
Surface and Coatings Technology, 202 (12), .
(doi:10.1016/j.surfcoat.2007.10.006).
Abstract
High velocity oxygen fuel (HVOF) thermal spray technology is able to produce very dense coating without over-heating powder particles. The quality of coating is directly related to the particle parameters such as velocity, temperature and state of melting or solidification. In order to obtain this particle data, mathematical models are developed to predict particle dynamic behaviour in a liquid fuelled high velocity oxy-fuel thermal spray gun. The particle transport equations are solved in a Lagrangian manner and coupled with the three-dimensional, chemically reacting, turbulent gas flow. The melting and solidification within particles as a result of heat exchange with the surrounding gas flow is solved numerically. The in-flight particle characteristics of Inconel 718 are studied and the effects of injection parameters on particle behavior are examined. The computational results show that the particles smaller than 10 ?m undergo melting and solidification prior to impact while the particle larger than 20 ?m never reach liquid state during the process.
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Submitted date: June 2007
Published date: 2008
Keywords:
CFD, HVOF, gas dynamics, particle modeling
Identifiers
Local EPrints ID: 54086
URI: http://eprints.soton.ac.uk/id/eprint/54086
ISSN: 0257-8972
PURE UUID: fe9b6618-fcb8-43aa-bdd0-81b85895d790
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Date deposited: 04 Aug 2008
Last modified: 15 Mar 2024 10:44
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Author:
S. Kamnis
Author:
Sai. Gu
Author:
N. Zeoli
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