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Elastic recovery at hardness indentations

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Abstract

The mechanics of hardness indentation are considered. On the basis of a cycle in which the loading is elastic-plastic and the unloading (and subsequent reloading) elastic, an expression is derived for the relative depth recovery of the impression as a function of hardness/modulus,H/E. Experimental observations on indented surfaces of selected materials, mostly ceramics, using a tilting procedure in the scanning electron microscope to measure the residual depths, confirm the predicted trends. The analysis offers a simple means of characterizing the deformation properties of materials and should provide a basis for evaluating a range of contact-related properties, particularly surface damage phenomena in sharp-particle impact.

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Authors and Affiliations

  1. Department of Applied Physics, School of Physics, University of New South Wales, 2033, Kensington, NSW, Australia

    B. R. Lawn & V. R. Howes

Authors
  1. B. R. Lawn
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  2. V. R. Howes
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Lawn, B.R., Howes, V.R. Elastic recovery at hardness indentations. J Mater Sci 16, 2745–2752 (1981). https://doi.org/10.1007/BF02402837

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  • DOI: https://doi.org/10.1007/BF02402837

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