Shock compression and release of a-axis magnesium single crystals: Anisotropy and time dependent inelastic response
Abstract
Here, to gain insight into inelastic deformation mechanisms for shocked hexagonal close-packed (hcp) metals, particularly the role of crystal anisotropy, magnesium (Mg) single crystals were subjected to shock compression and release along the a-axis to 3.0 and 4.8 GPa elastic impact stresses. Wave profiles measured at several thicknesses, using laser interferometry, show a sharply peaked elastic wave followed by the plastic wave. Additionally, a smooth and featureless release wave is observed following peak compression. When compared to wave profiles measured previously for c-axis Mg, the elastic wave amplitudes for a-axis Mg are lower for the same propagation distance, and less attenuation of elastic wave amplitude is observed for a given peak stress. The featureless release wave for a-axis Mg is in marked contrast to the structured features observed for c-axis unloading. Numerical simulations, using a time-dependent anisotropic modeling framework, showed that the wave profiles calculated using prismatic slip or (10$$\bar{1}$$2) twinning, individually, do not match the measured compression profiles for a-axis Mg. However, a combination of slip and twinning provides a good overall match to the measured compression profiles. In contrast to compression,prismatic slip alone provides a reasonable match to the measured release wave profiles; (10$$\bar{1}$$2) twinning due to itsmore »
- Authors:
-
- Washington State Univ., Pullman, WA (United States)
- Publication Date:
- Research Org.:
- Washington State Univ., Pullman, WA (United States). Inst. for Shock Physics
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
- OSTI Identifier:
- 1342519
- Alternate Identifier(s):
- OSTI ID: 1361748
- Grant/Contract Number:
- NA0002007
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 121; Journal Issue: 3; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE
Citation Formats
Renganathan, P., Winey, J. M., and Gupta, Y. M. Shock compression and release of a-axis magnesium single crystals: Anisotropy and time dependent inelastic response. United States: N. p., 2017.
Web. doi:10.1063/1.4974365.
Renganathan, P., Winey, J. M., & Gupta, Y. M. Shock compression and release of a-axis magnesium single crystals: Anisotropy and time dependent inelastic response. United States. https://doi.org/10.1063/1.4974365
Renganathan, P., Winey, J. M., and Gupta, Y. M. 2017.
"Shock compression and release of a-axis magnesium single crystals: Anisotropy and time dependent inelastic response". United States. https://doi.org/10.1063/1.4974365. https://www.osti.gov/servlets/purl/1342519.
@article{osti_1342519,
title = {Shock compression and release of a-axis magnesium single crystals: Anisotropy and time dependent inelastic response},
author = {Renganathan, P. and Winey, J. M. and Gupta, Y. M.},
abstractNote = {Here, to gain insight into inelastic deformation mechanisms for shocked hexagonal close-packed (hcp) metals, particularly the role of crystal anisotropy, magnesium (Mg) single crystals were subjected to shock compression and release along the a-axis to 3.0 and 4.8 GPa elastic impact stresses. Wave profiles measured at several thicknesses, using laser interferometry, show a sharply peaked elastic wave followed by the plastic wave. Additionally, a smooth and featureless release wave is observed following peak compression. When compared to wave profiles measured previously for c-axis Mg, the elastic wave amplitudes for a-axis Mg are lower for the same propagation distance, and less attenuation of elastic wave amplitude is observed for a given peak stress. The featureless release wave for a-axis Mg is in marked contrast to the structured features observed for c-axis unloading. Numerical simulations, using a time-dependent anisotropic modeling framework, showed that the wave profiles calculated using prismatic slip or (10$\bar{1}$2) twinning, individually, do not match the measured compression profiles for a-axis Mg. However, a combination of slip and twinning provides a good overall match to the measured compression profiles. In contrast to compression,prismatic slip alone provides a reasonable match to the measured release wave profiles; (10$\bar{1}$2) twinning due to its uni-directionality is not activated during release. The experimental results and wave profile simulations for a-axis Mg presented here are quite different from the previously published c-axis results, demonstrating the important role of crystal anisotropy on the time-dependent inelastic deformation of Mg single crystals under shock compression and release.},
doi = {10.1063/1.4974365},
url = {https://www.osti.gov/biblio/1342519},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 3,
volume = 121,
place = {United States},
year = {Thu Jan 19 00:00:00 EST 2017},
month = {Thu Jan 19 00:00:00 EST 2017}
}
Web of Science
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