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Measurement and analysis of plane-strain work hardening

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Abstract

A new technique for measurement of plane-strain work hardening has been developed which uses tensile loading and computer analysis for interpretation, and which eliminates the experimental uncertainties of large strain gradients, friction, and out-of-plane bending inherent in the usual plane-strain deformation modes. Plane-strain and tensile work-hardening curves have been measured for 2036-T4 aluminum alloy using several types of sheet specimens. The work-hardening rate in plane strain is lower than that in uniaxial tension. In each case a Voce-type empirical work hardening law represents the data well. Hill’s theories cannot account for these data because the isotropic hardening assumption is violated. A method of analysis was introduced to determine Hill’s newm parameter as a function of strain andm was found to vary from 1.6 to 2.0 in the strain range 0.02 ≤ ε ≤ 0.18.

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  1. Physics Department, General Motors Research Laboratories, 48090, Warren, MI

    R. H. Wagoner (Associate Senior Research Scientist)

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  1. R. H. Wagoner
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Wagoner, R.H. Measurement and analysis of plane-strain work hardening. Metall Trans A 11, 165–175 (1980). https://doi.org/10.1007/BF02700453

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