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Systematic investigation of residual strains associated with WC-Co coatings thermal sprayed onto metal substrates

Venter, Andrew M.; Pirling, Thilo; Buslaps, Thomas; Oladijo, O. Philip; Steuwer, Axel LU ; Ntsoane, Tshepo P.; Cornish, Lesley A. and Sacks, Natasha (2012) In Surface & Coatings Technology 206(19-20). p.4011-4020
Abstract
Using penetrating high-energy synchrotron X-ray radiation and thermal neutrons, the residual strains and stresses associated with the high-velocity oxygen-fuel (HVOF) thermal spray coating of WC-Co on two different substrate materials with significantly different coefficients of thermal expansion (CTE) to that of the coating material, have been investigated in a systematic approach. This approach enabled quantification of the residual strain and stress contributions that emanate from the different processing steps associated with the coating process. An eigenstrain approach enabled direct comparison of the contributions of the different processing steps to the plastic strains. It is shown that the dominant contribution originates from the... (More)
Using penetrating high-energy synchrotron X-ray radiation and thermal neutrons, the residual strains and stresses associated with the high-velocity oxygen-fuel (HVOF) thermal spray coating of WC-Co on two different substrate materials with significantly different coefficients of thermal expansion (CTE) to that of the coating material, have been investigated in a systematic approach. This approach enabled quantification of the residual strain and stress contributions that emanate from the different processing steps associated with the coating process. An eigenstrain approach enabled direct comparison of the contributions of the different processing steps to the plastic strains. It is shown that the dominant contribution originates from the grit-blast surface preparation step. Contributions purely from the coating process are not distinguishable from that of the grit blasting process within the measurement accuracy. For the as-coated samples no obvious contributions ascribable to the differences in the CTEs of the substrates, or impact related effects are observed. (c) 2012 Elsevier B.V. All rights reserved. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Residual strains, WC-Co coatings, Neutron diffraction, Synchrotron, X-rays, High-velocity oxygen-fuel, Eigenstrain
in
Surface & Coatings Technology
volume
206
issue
19-20
pages
4011 - 4020
publisher
Elsevier
external identifiers
  • wos:000305662400027
  • scopus:84861457493
ISSN
0257-8972
DOI
10.1016/j.surfcoat.2012.03.081
language
English
LU publication?
yes
id
227d2e36-c5b2-4ce6-8127-7899becc3766 (old id 2883722)
date added to LUP
2012-07-24 15:47:59
date last changed
2017-01-01 05:51:59
@article{227d2e36-c5b2-4ce6-8127-7899becc3766,
  abstract     = {Using penetrating high-energy synchrotron X-ray radiation and thermal neutrons, the residual strains and stresses associated with the high-velocity oxygen-fuel (HVOF) thermal spray coating of WC-Co on two different substrate materials with significantly different coefficients of thermal expansion (CTE) to that of the coating material, have been investigated in a systematic approach. This approach enabled quantification of the residual strain and stress contributions that emanate from the different processing steps associated with the coating process. An eigenstrain approach enabled direct comparison of the contributions of the different processing steps to the plastic strains. It is shown that the dominant contribution originates from the grit-blast surface preparation step. Contributions purely from the coating process are not distinguishable from that of the grit blasting process within the measurement accuracy. For the as-coated samples no obvious contributions ascribable to the differences in the CTEs of the substrates, or impact related effects are observed. (c) 2012 Elsevier B.V. All rights reserved.},
  author       = {Venter, Andrew M. and Pirling, Thilo and Buslaps, Thomas and Oladijo, O. Philip and Steuwer, Axel and Ntsoane, Tshepo P. and Cornish, Lesley A. and Sacks, Natasha},
  issn         = {0257-8972},
  keyword      = {Residual strains,WC-Co coatings,Neutron diffraction,Synchrotron,X-rays,High-velocity oxygen-fuel,Eigenstrain},
  language     = {eng},
  number       = {19-20},
  pages        = {4011--4020},
  publisher    = {Elsevier},
  series       = {Surface & Coatings Technology},
  title        = {Systematic investigation of residual strains associated with WC-Co coatings thermal sprayed onto metal substrates},
  url          = {http://dx.doi.org/10.1016/j.surfcoat.2012.03.081},
  volume       = {206},
  year         = {2012},
}