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DOE OSTI · 3374171

High-pressure melt dynamics in shock-compressed titanium

Singh, Saransh [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000202869549)·Paul, Reetam [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0009000835771186)·Rampal, Nikhil [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000321435874)·Bunting, Rhys J. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:000000016928074X)·Hamel, Sebastien [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000342460892)·Pulver, Nathan [Univ. of California, Los Angeles, CA (United States)] (ORCID:0000000168467510)·McGuire, Christopher P. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)]·Clarke, Samantha M. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000268749929)·Coleman, Amy L. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000256924400)·Vennari, Cara [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:000000015160913X)·Hutchinson, Trevor M. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000318823702)·Pereira, Kimberly A. [Univ. of Massachusetts, Amherst, MA (United States)]·Nagler, Bob [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)] (ORCID:0009000257367842)·Khaghani, Dimitri [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)] (ORCID:0000000251392310)·Lee, Hae Ja [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)]·Czapla, Nicholas A. [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)]·Volz, Travis [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)]·OCampo, Ian K. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000302800805)·McNaney, James [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000335269379)·Lockard, Thomas E. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)]·Eggert, Jon H. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000157307108)·Lazicki, Amy [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)]·Wehrenberg, Christopher E. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)]·Krygier, Andrew [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000161781195)·Smith, Raymond F. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000256755731)
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Abstract

In this work 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 ∼111−124GPa 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 (∼110−126GPa). Above 126 GPa, we observe the persistence of residual levels of highly textured crystalline Ti to ∼180GPa, 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.

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36 MATERIALS SCIENCE75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITYMaterials scienceMolecular dynamicsPhase transitionsPhysics - Condensed matter physicsShock wavesX-ray diffraction

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Singh, Saransh [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000202869549), Paul, Reetam [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0009000835771186), Rampal, Nikhil [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000321435874), Bunting, Rhys J. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:000000016928074X), Hamel, Sebastien [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000342460892), Pulver, Nathan [Univ. of California, Los Angeles, CA (United States)] (ORCID:0000000168467510), McGuire, Christopher P. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)], Clarke, Samantha M. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000268749929), Coleman, Amy L. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000256924400), Vennari, Cara [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:000000015160913X), Hutchinson, Trevor M. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000318823702), Pereira, Kimberly A. [Univ. of Massachusetts, Amherst, MA (United States)], Nagler, Bob [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)] (ORCID:0009000257367842), Khaghani, Dimitri [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)] (ORCID:0000000251392310), Lee, Hae Ja [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)], Czapla, Nicholas A. [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)], Volz, Travis [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)], OCampo, Ian K. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000302800805), McNaney, James [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000335269379), Lockard, Thomas E. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)], Eggert, Jon H. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000157307108), Lazicki, Amy [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)], Wehrenberg, Christopher E. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)], Krygier, Andrew [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000161781195), Smith, Raymond F. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000256755731). 2026-05-15. High-pressure melt dynamics in shock-compressed titanium. https://doi.org/10.1103/w5wv-rmrn

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