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Title: Twinning and Dislocation Evolution during Shock Compression and Release of Single Crystals: Real-Time X-Ray Diffraction

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.
Authors:
 [1] ;  [1] ;  [1] ;  [1]
  1. Washington State Univ., Pullman, WA (United States)
Publication Date:
Grant/Contract Number:
NA0002442; NA0002007; AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 26; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Washington State Univ., Pullman, WA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1464950
Alternate Identifier(s):
OSTI ID: 1457823; OSTI ID: 1476639

Turneaure, Stefan J., Renganathan, P., Winey, J. M., and Gupta, Y. M.. Twinning and Dislocation Evolution during Shock Compression and Release of Single Crystals: Real-Time X-Ray Diffraction. United States: N. p., Web. doi:10.1103/PhysRevLett.120.265503.
Turneaure, Stefan J., Renganathan, P., Winey, J. M., & Gupta, Y. M.. Twinning and Dislocation Evolution during Shock Compression and Release of Single Crystals: Real-Time X-Ray Diffraction. United States. doi:10.1103/PhysRevLett.120.265503.
Turneaure, Stefan J., Renganathan, P., Winey, J. M., and Gupta, Y. M.. 2018. "Twinning and Dislocation Evolution during Shock Compression and Release of Single Crystals: Real-Time X-Ray Diffraction". United States. doi:10.1103/PhysRevLett.120.265503.
@article{osti_1464950,
title = {Twinning and Dislocation Evolution during Shock Compression and Release of Single Crystals: Real-Time X-Ray Diffraction},
author = {Turneaure, Stefan J. and Renganathan, P. and Winey, J. M. and Gupta, Y. M.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.120.265503},
journal = {Physical Review Letters},
number = 26,
volume = 120,
place = {United States},
year = {2018},
month = {6}
}