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Extreme Hardening of Pb at High Pressure and Strain Rate

A. Krygier, P. D. Powell, J. M. McNaney, C. M. Huntington, S. T. Prisbrey, B. A. Remington, R. E. Rudd, D. C. Swift, C. E. Wehrenberg, A. Arsenlis, H.-S. Park, P. Graham, E. Gumbrell, M. P. Hill, A. J. Comley, and S. D. Rothman
Phys. Rev. Lett. 123, 205701 – Published 11 November 2019
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Abstract

We study the high-pressure strength of Pb and Pb-4wt%Sb at the National Ignition Facility. We measure Rayleigh-Taylor growth of preformed ripples ramp compressed to 400GPa peak pressure, among the highest-pressure strength measurements ever reported on any platform. We find agreement with 2D simulations using the Improved Steinberg-Guinan strength model for body-centered-cubic Pb; the Pb-4wt%Sb alloy behaves similarly within the error bars. The combination of high-rate, pressure-induced hardening and polymorphism yield an average inferred flow stress of 3.8GPa at high pressure, a 250-fold increase, changing Pb from soft to extremely strong.

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  • Received 26 February 2019

DOI:https://doi.org/10.1103/PhysRevLett.123.205701

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

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Soft Metal Gains Hulk-Like Strength

Published 11 November 2019

When rapidly compressed to planetary-core pressures, lead—a soft metal—becomes 10 times stronger than high-grade steel.

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Authors & Affiliations

A. Krygier*, P. D. Powell, J. M. McNaney, C. M. Huntington, S. T. Prisbrey, B. A. Remington, R. E. Rudd, D. C. Swift, C. E. Wehrenberg, A. Arsenlis, and H.-S. Park

  • Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, California 94550, USA

P. Graham, E. Gumbrell, M. P. Hill, A. J. Comley, and S. D. Rothman

  • Atomic Weapons Establishment, Aldermaston, Reading, Berkshire RG7 4PR, United Kingdom

  • *krygier1@llnl.gov

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Vol. 123, Iss. 20 — 15 November 2019

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