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Application of the X-ray synergy method to analysis of room temperature compression of beryllium crystals

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Abstract

A recently-developed method (synergy method) was applied to zone-refined beryllium crystals compressed at room temperature. The synergy method, combining X-ray diffraction line profile analysis, X-ray topography and metallography, is capable of analyzing lattice defects in small volume elements of the crystal (10-μ diam cross-section by 5 mm in this case). Crystals oriented for basal slip, prism slip, andc-axis compression were examined. The existence of a columnar growth substructure was shown, which determined the response of the crystal to subsequent deformation. Inhomogeneous lattice rotation and basal plane bending induced by the interaction of basal slip dislocations with the columnar subgrain boundaries appeared to be a precursor of bend plane splitting. Crystals oriented for prism slip exhibited extensive twinning and those forc-axis compression gave rise to extensive basal slip. The predominance of basal slip in beryllium during room temperature deformation was found to be consistent with unique, anisotropic bonding characteristics.

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Authors and Affiliations

  1. Autonetics, Research and Technology Division, Anaheim, Calif.

    H. L. Glass (Staff Scientist)

  2. Materials Research Laboratory. College of Engineering, Rutgers University, New Brunswick, N.J.

    S. Weissmann (Professor and Director)

Authors
  1. H. L. Glass
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  2. S. Weissmann
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Additional information

This paper is based upon a thesis submitted by H. L. Glass in partial fulfillment of the requirements for the degree of Doctor of Philosophy at Rutgers University.

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Glass, H.L., Weissmann, S. Application of the X-ray synergy method to analysis of room temperature compression of beryllium crystals. Metall Trans 2, 2865–2874 (1971). https://doi.org/10.1007/BF02813265

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  • DOI: https://doi.org/10.1007/BF02813265

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