Twinning and Dislocation Evolution during Shock Compression and Release of Single Crystals: Real-Time X-Ray Diffraction
- Washington State Univ., Pullman, WA (United States)
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. Non-cubic 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.
- Research Organization:
- Washington State Univ., Pullman, WA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0002442; NA0002007; AC02-06CH11357
- OSTI ID:
- 1464950
- Alternate ID(s):
- OSTI ID: 1457823; OSTI ID: 1476639
- Journal Information:
- Physical Review Letters, Vol. 120, Issue 26; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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