4.7 Article

Combined effect of abrasive particle size distribution and ball material on the wear coefficient in micro-scale abrasive wear tests

Journal

WEAR
Volume 476, Issue -, Pages -

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.wear.2021.203639

Keywords

Micro-abrasive wear test; Abrasive particle size distribution; Ball material; Wear coefficient; Load per particle

Funding

  1. Brazilian agency Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)

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The study found that changing the ball material can alter the behavior of the wear coefficient and affect the influence of particle size distribution on the wear coefficient. The analysis of wear coefficients in each case resulted in a map describing the combined influence of granulometric distributions of abrasive particles and ball material on the wear coefficient.
Micro-abrasive wear tests were carried out to analyze the combined effect of abrasive particle size distribution and ball material on the wear coefficient. Different particle size distributions were obtained by mixing different fractions of two silicon carbide (SiC) abrasive powders, having average particle sizes of 6.0 mu m and 14.4 mu m. Tests were conducted using two different normal loads, 0.2 and 0.4 N, AISI 1020 steel samples and balls made of AISI 52100 martensitic steel, AISI 304 austenitic stainless steel, polyurethane rubber and zirconia-alumina. Worn surfaces were analyzed with Scanning Electron Microscopy (SEM) and by optical profilometry. Results have indicated that a change in ball material, with consequential modification in the ratio between the hardness of the body and the counter-body, enabled different behaviors of the wear coefficient with the variation of the granulometric distribution. Such differences are due to the ability of the particles to be embedded and dragged into contact. The wear coefficients were analyzed in each case, resulting in a map to describe the combined influence of granulometric distributions of abrasive particles and ball material on the wear coefficient.

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