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Effect of purity and processing procedure on the mechanical properties of beryllium sheet

  • Mechanical Behavior
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Abstract

The purpose of this research was to assess what improvements might be obtained in the bend ductility of beryllium sheet by starting with high purity commercial powder and consolidating it into sheet by techniques that minimized deformation and texturing. Sound sheet was achieved with reduction ratios from 2∶1 to 12∶1 at temperatures from 700° to 1050°C by forging, upsetting and compression rolling. Compression rolling is accomplished by successively changing the rolling direction by 30 deg after each pass so that no preferred rolling direction was developed. It was found that as the plastic bend ductility increased (up to 4 pct) the yield strength decreased. The higher bend ductilities corresponded to lower reduction ratios, lower degrees of preferred orientation and a larger subgrain size as determined by transmission electron microscopy. Sheet prepared by commercial rolling practices from the less pure commercial powder exhibited similar behavior. The ductile-to-brittle transition temperature for bending decreased with improved purity and reduced texture.

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Author information

Authors and Affiliations

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

    F. W. Cooke (Manager)

  2. Materials Science, Materials Laboratories, Allison Division, General Motors Corp., Indianapolis, Ind.

    M. Herman (Section Chief)

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

    H. Conrad (Professor of Materials Science and Chairman)

Authors
  1. F. W. Cooke
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  2. M. Herman
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  3. H. Conrad
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Additional information

M. HERMAN, formerly with The Franklin Institute Research Laboratories

H. CONRAD, formerly with The Franklin Institute Research Laboratories

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Cooke, F.W., Herman, M. & Conrad, H. Effect of purity and processing procedure on the mechanical properties of beryllium sheet. Metall Trans 2, 1297–1305 (1971). https://doi.org/10.1007/BF02913352

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  • DOI: https://doi.org/10.1007/BF02913352

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