Measuring material strength in laser compressed Ta via in situ X-ray diffraction at the Dynamic Compression Sector

ORAL

Abstract

We present X-ray diffraction measurements of shock and ramp compressed tantalum performed at the Dynamic Compression Sector (DCS). By using a ‘tilted target’ geometry, we can find the sample shear strain by observing deviations in the Debye-Scherrer line position as a function of azimuthal angle [1]. This can be related to strength via the shear modulus, allowing for comparison with other high strain rate-strength experiments, such as Rayleigh-Taylor instability [2] and planar ramp release [3]. The results are compared to synthetic X-ray diffraction patterns generated by in our in-house developed crystal plasticity finite element model (CPFEM) [4]. UK Ministry of Defence © Crown owned copyright 2025/AWE

[1] A. K. Singh et al., J. Appl. Phys. 73 (9) (1993): 4278-4286.

[2] H.-S. Park et al., AIP Conf. Proc. 1426 (1) (2012) 1371–137

[3] J. L. Brown et al., J. Appl. Phys. 115 (2014) 043530

[4] P. Avraam et al., Phys. Rev. Mater. 7 (11), 113608

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Presenters

  • David McGonegle

    • AWE
    • AWE NST

Authors

  • David McGonegle

    • AWE
    • AWE NST

  • Jon H Eggert

    • Lawrence Livermore National Laboratory

  • Emma Floyd

    • Atomic Weapons Establishment
    • Magdalena Ridge Observatory

  • Chris P McGuire

    • Lawrence Livermore National Laboratory

  • Cara Vennari

    • Lawrence Livermore National Laboratory

  • Raymond F Smith

    • Lawrence Livermore National Laboratory

  • James Turner

    • AWE NST

  • Susanna Whitlock

    • AWE NST

  • Andrew Krygier

    • Lawrence Livermore National Laboratory