- Open Access
Vanishing dynamic strength measured in a transient high-pressure phase of tin
Phys. Rev. E 113, 065502 – Published 3 June, 2026
DOI: https://doi.org/10.1103/q5kp-5yj1
Abstract
This work reports two independent experimental estimations of the dynamic strength of the body-centered tetragonal (bct) phase of tin, which occurs at pressures above about 9 GPa and transforms promptly back to the ambient phase upon pressure release. Measuring strength in such a transient high-pressure phase is challenging. One measurement used free-surface Richtmyer-Meshkov instabilities generated with gas gun impact. Another set of measurements used ramp-release loading in a pulsed-power facility. Strength estimations came from comparison to simulations using a comprehensive multiphase modeling framework that includes equation of state, shear moduli, and strength separately for each phase, and treats mixed-phase regions. Both experimental methods found the -phase strength to be very low, within experimental uncertainty of zero. The existing literature on other materials, by contrast, almost universally reports higher strength in transient high-pressure phases compared with ambient phases. Recent Molecular-Dynamics simulations on tin in the literature showed almost zero deviatoric strength during a deformation-induced bct bct transformation in which one of the -phase axes “flips” to the axis. This reorientation currently provides the most plausible explanation for the low observed strength in -phase tin.
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