Transitions in microabrasion mechanisms for WC - Co (HVOF) coated steel

M.M. Stack, M.T. Mathew

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this work, the microabrasion of an HVOF (high-velocity oxy fuel) tungsten carbide (WC) - Co-based composite coating was investigated and compared with the performance of the substrate material, 316 stainless steel. The effects of sliding distance and applied load were investigated for both materials. Optical, scanning electron, and atomic force microscopy were used to characterize the surfaces following microabrasion. The results showed that the microabrasion rate peaked at intermediate loads for the materials. The critical load at which the peak was observed varied with sliding distance. There was a change in the performance of the coated versus the uncoated material, with the coating out-performing the substrate material at shorter sliding distances but with the reverse pattern occurring at longer sliding distances. The results were interpreted in terms of changes of microabrasion mechanisms as a function of increasing load and sliding distance. Microabrasion mechanisms were discussed based on the transition between wear volume as a function of load and sliding distance.
LanguageEnglish
Pages49-57
Number of pages8
JournalProceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
Volume219
Issue number1
DOIs
Publication statusPublished - 2005

Fingerprint

Steel
sliding
steels
Tungsten carbide
Composite coatings
Stainless Steel
coatings
Substrates
tungsten carbides
Atomic force microscopy
Stainless steel
Wear of materials
stainless steels
Scanning
Coatings
atomic force microscopy
Electrons
scanning
composite materials
electrons

Keywords

  • micro-abrasion
  • corrosion
  • tribology
  • wear
  • wear mechanisms

Cite this

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abstract = "In this work, the microabrasion of an HVOF (high-velocity oxy fuel) tungsten carbide (WC) - Co-based composite coating was investigated and compared with the performance of the substrate material, 316 stainless steel. The effects of sliding distance and applied load were investigated for both materials. Optical, scanning electron, and atomic force microscopy were used to characterize the surfaces following microabrasion. The results showed that the microabrasion rate peaked at intermediate loads for the materials. The critical load at which the peak was observed varied with sliding distance. There was a change in the performance of the coated versus the uncoated material, with the coating out-performing the substrate material at shorter sliding distances but with the reverse pattern occurring at longer sliding distances. The results were interpreted in terms of changes of microabrasion mechanisms as a function of increasing load and sliding distance. Microabrasion mechanisms were discussed based on the transition between wear volume as a function of load and sliding distance.",
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AU - Mathew, M.T.

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