Acoustic emission study on WC-Co thermal sprayed coatings
Acoustic emission study on WC-Co thermal sprayed coatings
Thermally sprayed coatings contain residual stresses that are produced in the spraying process. These may reduce the coating lifetime. In order to determine the optimum spraying conditions with respect to the residual stress level present, the acoustic emission (AE) during four-point bend tests on tungsten carbide–cobalt coatings sprayed onto mild steel substrates was investigated. Samples tested at different levels of deformation were studied by means of scanning electron microscopy and AE in order to understand the cracking mechanisms. Relationships between the number and amplitude of AE events detected and the type of cracking processes occurring were established. It has been possible to compare the residual stresses caused by the effect of different spraying parameters, such as coating thickness, spraying distance and high velocity oxy-fuel gun.
WC–Co, acoustic emission, bending test, fracture mechanism
55-63
Miguel, J.M.
0bfc3896-907c-486c-951c-ed82eec4684c
Guilemany, J.M.
61efea12-3da8-4ef1-b025-2187455b58c0
Mellor, B.G.
2b13b80f-880b-49ac-82fe-827a15dde2fe
Xu, Y.M.
b67d6652-86e9-4e99-8286-dbb9733a8cc8
2003
Miguel, J.M.
0bfc3896-907c-486c-951c-ed82eec4684c
Guilemany, J.M.
61efea12-3da8-4ef1-b025-2187455b58c0
Mellor, B.G.
2b13b80f-880b-49ac-82fe-827a15dde2fe
Xu, Y.M.
b67d6652-86e9-4e99-8286-dbb9733a8cc8
Miguel, J.M., Guilemany, J.M., Mellor, B.G. and Xu, Y.M.
(2003)
Acoustic emission study on WC-Co thermal sprayed coatings.
Materials Science and Engineering: A, 352 (1-2), .
(doi:10.1016/S0921-5093(02)00546-4).
Abstract
Thermally sprayed coatings contain residual stresses that are produced in the spraying process. These may reduce the coating lifetime. In order to determine the optimum spraying conditions with respect to the residual stress level present, the acoustic emission (AE) during four-point bend tests on tungsten carbide–cobalt coatings sprayed onto mild steel substrates was investigated. Samples tested at different levels of deformation were studied by means of scanning electron microscopy and AE in order to understand the cracking mechanisms. Relationships between the number and amplitude of AE events detected and the type of cracking processes occurring were established. It has been possible to compare the residual stresses caused by the effect of different spraying parameters, such as coating thickness, spraying distance and high velocity oxy-fuel gun.
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Published date: 2003
Keywords:
WC–Co, acoustic emission, bending test, fracture mechanism
Organisations:
Engineering Sciences
Identifiers
Local EPrints ID: 22400
URI: http://eprints.soton.ac.uk/id/eprint/22400
ISSN: 0921-5093
PURE UUID: d26db94d-16f1-41f5-a076-203614aa6d45
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Date deposited: 23 Mar 2006
Last modified: 15 Mar 2024 06:37
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Contributors
Author:
J.M. Miguel
Author:
J.M. Guilemany
Author:
B.G. Mellor
Author:
Y.M. Xu
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