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The effects of temperature and strain rate on the strength of beryllium sheet

  • Mechanical Behavior
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Abstract

The stress-strain behavior and the deformation dynamics of compression rolled and hot upset beryllium sheet prepared from SR powder were investigated in tension over the range 25° to 355°C. The true stress-true strain curves were approximated by the relationσ =σ(0) +hε 1/2. Both σ(0) andh decreased with temperature. σ(0) was higher at all temperatures for the compression rolled sheet, whereash was the same for the two materials. The difference in σ(0) was in the athermal component of the stress. The effects of temperature and strain rate on the flow-stress of the polycrystalline sheet agreed with those for prism slip in single crystals. Thermal activation analysis of the deformation dynamics yielded values of 123 to 158 b3 for the activation volume, 1.5×107 sec−1 for the preexponential factor and 1.8 ev (0.18 μb3) for the activation energy,Ho.

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Authors and Affiliations

  1. Metallurgy Laboratory, The Franklin Institute Research Laboratories, Philadelphia, Pa.

    F. W. Cooke (Manager)

  2. Department of Metallurgy, University of Kentucky, Lexington, Ky.

    H. Conrad (Professor of Materials Engineering and Chairman)

Authors
  1. H. Conrad
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  2. F. W. Cooke
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H. CONRAD, formerly with the Franklin Institute Research Laboratories

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Conrad, H., Cooke, F.W. The effects of temperature and strain rate on the strength of beryllium sheet. Metall Trans 2, 1307–1313 (1971). https://doi.org/10.1007/BF02913353

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  • DOI: https://doi.org/10.1007/BF02913353

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