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On the strain-hardening parameters of metals

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Abstract

The applicability of the Ludwik, Hollomon, Swift and Voce equations in describing the stress - strain curves of metals was investigated. Calculated uniform strain values were found to depend on the equation used. Even when the Hollomon equation gave a high linear correlation coefficient in log-log coordinates, the strain-hardening exponent n could give an erroneous uniform strain. The equation with the lowest standard error of estimate gave the uniform strain nearest to the value obtained by direct measurement from the load-elongation curve.

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Authors and Affiliations

  1. Finnish Academy, Department of Mining and Metallurgy, Helsinki University of Technology, Otaniemi, Finland

    H. J. Kleemola (Senior Fellow)

  2. Metal Laboratory, Pori Works, Outokumpu Oy, Pori, Finland

    M. A. Nieminen (Research Metallurgist)

Authors
  1. H. J. Kleemola
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  2. M. A. Nieminen
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Kleemola, H.J., Nieminen, M.A. On the strain-hardening parameters of metals. Metall Trans 5, 1863–1866 (1974). https://doi.org/10.1007/BF02644152

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