Correlation between residual stress and abrasive wear of WC-17Co coatings

Journal article

Authors / Editors

Oladijo, Philip

Research Areas

ENGINEERING AND TECHNOLOGY (Frascati classification)

Publication Details

Subtitle: Correlation between residual stress and abrasive wear of WC-17Co coatings

Author list: Oladijo, Philip

Publisher: Elsevier

Publication year: 2014

Journal: International Journal of Refractory Metals and Hard Materials (0263-4368)

Volume number: 44

Start page: 68

End page: 76

Number of pages: 9

ISSN: 0263-4368

Abstract

This investigation had been conducted to determine the influence of residual stresses on the abrasive wear resistance of HVOF thermal spray WC–17 wt.% Co coatings, as well as to derive stress relaxation after cutting by wire electric discharge machining (EDM). The abrasive wear properties of the coatings were characterised using an ASTM-G65 three body abrasive wear machine with silica sand as the abrasive. The residual stress was measured by means of X-ray diffraction techniques, on the coated samples before and after the abrasive wear tests. Compressive residual stresses were observed in the surface layer of the large coated samples. However, stress relaxation results after cutting into small sizes were distinctly different. There was strong correlation between residual stresses in the surface layer and abrasive wear resistance, as well as yield strength of a material.

Keywords

Residual stressHVOFWC–Co coatingX-ray diffractionAbrasive wear

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