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Development of crystallographic texture during high rate deformation of rolled and hot-pressed beryllium

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Abstract

Weakly textured hot-pressed (HP) beryllium and strongly textured hot-rolled beryllium were compressed using a split-Hopkinson pressure bar (SHPB) (strain rate ∼4500 s−1) to a maximum of 20 pct plastic strain as a function of temperature. The evolution of the crystallographic texture was monitored with neutron diffraction and compared to polycrystal plasticity models for the purpose of interpretation. The macroscopic response of the material and the active deformation mechanisms were found to be highly dependent on the orientation of the load with respect to the initial texture. Specifically, twinning is inactive when loaded parallel to the strong basal fiber but accounts for 27 pct of the plastic strain when loaded transverse to the basal fiber. In randomly textured samples, 15 pct of the plastic strain is accomplished by twinning. The role of deformation mechanisms with components out of the basal plane (i.e., twinning and pyramidal slip) is discussed.

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Authors and Affiliations

  1. the Materials Science and Technology Division, Los Alamos National Laboratory, 87545, Los Alamos, Mexico

    D. W. Brown, S. P. Abeln (Technical Staff Member), W. R. Blumenthal (Technical Staff Member), M. A. M. Bourke (Technical Staff Member), M. C. Mataya (Technical Staff Member) & C. N. Tomé (Technical Staff Member)

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  1. D. W. Brown
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  2. S. P. Abeln
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  3. W. R. Blumenthal
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  4. M. A. M. Bourke
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  5. M. C. Mataya
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Brown, D.W., Abeln, S.P., Blumenthal, W.R. et al. Development of crystallographic texture during high rate deformation of rolled and hot-pressed beryllium. Metall Mater Trans A 36, 929–939 (2005). https://doi.org/10.1007/s11661-005-0287-9

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  • DOI: https://doi.org/10.1007/s11661-005-0287-9

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