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High-pressure, laser-driven deformation of an aluminum alloy

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Abstract

Recent development of a laser-based experimental platform allows loading materials to high pressures in the solid state while controlling both strain rate and peak pressure. The drive utilizes momentum transfer from a plasma generated by the introduction of a strong shock in a reservoir of low-Z material. This study looks at the response of a commercial aluminum alloy (6061-T6) subjected to pressures of 18 and 40 GPa at strain rates of 107/s and 5 × 107/s, respectively. It was found that the depth of the crater formed on the sample surface is a good indicator of the general yield behavior of the material and that a relatively simple strength model prevails under the loading conditions considered here. Metallographic examination of recovered samples showed no evidence of shear-band formation or significant melting due to plasma-surface interactions. Crystal plasticity-based calculations were used to assess the effects of material texture. Lack of shear-band formation during the laser-based drive is rationalized by considering the strain gradient as compared to grain size and texture.

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Authors and Affiliations

  1. Materials Science and Technology Division, the Lawrence Livermore National Laboratory, 94550-9234, Livermore, CA

    J. M. McNaney (Scientist)

  2. AX Division, the Lawrence Livermore National Laboratory, 94550-9234, Livermore, CA

    M. J. Edwards (Scientist)

  3. New Technologies Engineering Division, the Lawrence Livermore National Laboratory, 94550-9234, Livermore, CA

    R. Becker (Scientist)

  4. NIF Programs Directorate, the Lawrence Livermore National Laboratory, 94550-9234, Livermore, CA

    K. T. Lorenz (Scientist) & B. A. Remington (Scientist)

Authors
  1. J. M. McNaney
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  2. M. J. Edwards
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  3. R. Becker
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  4. K. T. Lorenz
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  5. B. A. Remington
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Additional information

This article is based on a presentation given in the symposium “Dynamic Deformation: Constitutive Modeling, Grain Size, and Other Effects: In Honor of Prof. Ronald W. Armstrong,” March 2–6, 2003, at the 2003 TMS/ASM Annual Meeting, San Diego, California, under the auspices of the TMS/ASM Joint Mechanical Behavior of Materials Committee.

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McNaney, J.M., Edwards, M.J., Becker, R. et al. High-pressure, laser-driven deformation of an aluminum alloy. Metall Mater Trans A 35, 2625–2631 (2004). https://doi.org/10.1007/s11661-004-0208-3

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  • DOI: https://doi.org/10.1007/s11661-004-0208-3

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