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High pressure melt dynamics in shock-compressed titanium
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High pressure melt dynamics in shock-compressed titanium
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Paper
High pressure melt dynamics in shock-compressed titanium
2026
Overview
We study the high-pressure melting behavior of titanium using laser-driven shock compression with in situ femtosecond x-ray diffraction and molecular-dynamics simulations based on a machine-learned interatomic potential. The MD simulations predict the solid-liquid coexistence on the Hugoniot in the $\\sim$$111-124\\( GPa range. Experimentally, we observe the first evidence of liquid at 86 GPa. We also observe pronounced microstructural changes with pressure with strong grain refinement associated with the emergence of liquid, within the solid-liquid coexistence (\\)\\sim$$110-126\\( GPa). Above 126 GPa, we observe the persistence of residual levels of highly textured crystalline Ti to \\)\\sim$$180$ GPa, well above the expected melt completion pressure. We discuss the accuracy that current laser-shock experimental platforms have at determining the melt onset and completion pressures.
Publisher
Cornell University Library, arXiv.org
Subject
