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 language | English |
|---|---|
| Pages (from-to) | 4011-4020 |
| Number of pages | 10 |
| Journal | Surface and Coatings Technology |
| Volume | 206 |
| Issue number | 19-20 |
| DOIs | |
| Publication status | Published - May 25 2012 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry
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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 journal › Article
TY - JOUR
T1 - Systematic investigation of residual strains associated with WC-Co coatings thermal sprayed onto metal substrates
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
PY - 2012/5/25
Y1 - 2012/5/25
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84861457493&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861457493&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2012.03.081
DO - 10.1016/j.surfcoat.2012.03.081
M3 - Article
VL - 206
SP - 4011
EP - 4020
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
SN - 0257-8972
IS - 19-20
ER -