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Distribution of Twins around a Microhardness Indenter in Close-packed Hexagonal Metals

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Abstract

ATTEMPTS have been made to explain the hardness anisotropy of close-packed hexagonal metals in terms of the slip and deformation twinning modes which are available1–5. As a result, simplified models of the stress system around an indenter have been developed in which the shear stresses acting adjacent to the indenter facets are resolved in the slip and twinning planes and in the respective shear directions. The hardness variation was shown to be consistent with the variation in the resolved shear stresses for twinning in the basal planes of zinc, magnesium3 and beryllium4 and in the prism planes of zinc and magnesium3. It was therefore concluded that the hardness anisotropy could be due to twinning.

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Authors and Affiliations

  1. Royal Aircraft Establishment, Farnborough, Hants

    P. G. PARTRIDGE

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  1. P. G. PARTRIDGE
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PARTRIDGE, P. Distribution of Twins around a Microhardness Indenter in Close-packed Hexagonal Metals. Nature 203, 634–635 (1964). https://doi.org/10.1038/203634a0

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