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

Andrew M. Venter, Thilo Pirling, Thomas Buslaps, O. Philip Oladijo, Axel Steuwer, Tshepo P. Ntsoane, Lesley A. Cornish, Natasha Sacks

Research output: Contribution to journalArticle

5 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)4011-4020
Number of pages10
JournalSurface and Coatings Technology
Volume206
Issue number19-20
DOIs
Publication statusPublished - May 25 2012

Fingerprint

grit
coating
Metals
coatings
Coatings
Substrates
metals
blasts
thermal neutrons
sprayers
thermal expansion
synchrotrons
Blasting
plastics
Processing
Synchrotrons
Thermal expansion
neutrons
Plastic deformation
preparation

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Venter, Andrew M. ; Pirling, Thilo ; Buslaps, Thomas ; Oladijo, O. Philip ; Steuwer, Axel ; Ntsoane, Tshepo P. ; Cornish, Lesley A. ; Sacks, Natasha. / Systematic investigation of residual strains associated with WC-Co coatings thermal sprayed onto metal substrates. In: Surface and Coatings Technology. 2012 ; Vol. 206, No. 19-20. pp. 4011-4020.
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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; Ntsoane, Tshepo P.; Cornish, Lesley A.; Sacks, Natasha.

In: Surface and Coatings Technology, Vol. 206, No. 19-20, 25.05.2012, p. 4011-4020.

Research output: Contribution to journalArticle

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AU - Venter, Andrew M.

AU - Pirling, Thilo

AU - Buslaps, Thomas

AU - Oladijo, O. Philip

AU - Steuwer, Axel

AU - Ntsoane, Tshepo P.

AU - Cornish, Lesley A.

AU - Sacks, Natasha

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