Extreme Hardening of Pb at High Pressure and Strain Rate

Autor:	Andrew Krygier, S. D. Rothman, Andrew Comley, D. C. Swift, Shon Prisbrey, Philip D. Powell, P. Graham, James McNaney, Channing Huntington, Robert E. Rudd, Christopher Wehrenberg, Bruce Remington, M. P. Hill, H.-S. Park, E. T. Gumbrell, Athanasios Arsenlis
Rok vydání:	2019
Předmět:	Materials science Peak pressure Alloy General Physics and Astronomy engineering.material Strain rate Flow stress 01 natural sciences High pressure Error bar 0103 physical sciences engineering Hardening (metallurgy) Composite material 010306 general physics
Zdroj:	Physical Review Letters. 123
ISSN:	1079-7114 0031-9007
Popis:	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 ∼400 GPa 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 ∼3.8 GPa at high pressure, a ∼250-fold increase, changing Pb from soft to extremely strong.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2991e6812cbb3e4083d3c325ce7b6f5 https://doi.org/10.1103/physrevlett.123.205701 Zobrazit plný text záznamu