Journal
PHYSICAL REVIEW LETTERS
Volume 120, Issue 26, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.265503
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Funding
- U.S. Department of Energy (DOE), National Nuclear Security Administration (NNSA) [DE-NA0002007]
- DOE/NNSA [DE-NA0002442]
- DOE Office of Science by Argonne National Laboratory [DE-AC02-06CH11357]
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Determining the temporal evolution of twinning and/or dislocation slip, in real-time (nanoseconds), in single crystals subjected to plane shock wave loading is a long-standing scientific need. Noncubic crystals pose special challenges because they have many competing slip and twinning systems. Here, we report on time-resolved, in situ, synchrotron Laue x-ray diffraction measurements during shock compression and release of magnesium single crystals that are subjected to compression along the c axis. Significant twinning was observed directly during stress release following shock compression; during compression, only dislocation slip was observed. Our measurements unambiguously distinguish between twinning and dislocation slip on nanosecond timescales in a shocked hexagonal-close-packed metal.
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