Acta metall. mater.Vol 43, No. 3, pp. 1037-1043, 1995.

Elastic/Plastic Effects During Very Low-load Hardness Testing of Copper

R.W. Armstrong, H. Shin and A.W. Ruff

A nano-indentation test system has been applied to obtaining continuous low-load/penetration depth results on a reference copper material. As usual, higher apparent hardness values occur at the lowest load values. An explanation is given in terms of the elastic load bearing capacity of the material. The analysis leads to a proposed hardness stress/strain description that appears to be satisfactory.

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