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The Use of Closely Spaced Vickers Indentations to Model Erosion of Polycrystalline α-Al2O3

  • Adolfo Franco Júnior (a1) and Steve G. Roberts (a2)

Abstract

Arrays of closely spaced quasi-static indentation were made on specimens of polycrystalline α-Al2O3, mean grain size G=1.2, 3.8 and 14.1 μm. The critical indentation spacing to produce crack coalescence between indentations, and thus significant loss of material from the surface, was determined. These data are compared to results for low-impact-velocity wet erosive wear on the same materials; a good correspondence is found. The indentation data can be used to produce “wear maps”, which provide a guideline for predicting the low-impact-velocity erosive wear resistance of brittle materials.

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The Use of Closely Spaced Vickers Indentations to Model Erosion of Polycrystalline α-Al2O3

  • Adolfo Franco Júnior (a1) and Steve G. Roberts (a2)

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