Lattice-level observation of the elastic-to-plastic relaxation process with subnanosecond resolution in shock-compressed Ta using time-resolved in situ Laue diffraction
Abstract
We report direct lattice level measurements of plastic relaxation kinetics through time-resolved, in-situ Laue diffraction of shock-compressed single-crystal [001] Ta at pressures of 27-210 GPa. For a 50 GPa shock, a range of shear strains is observed extending up to the uniaxial limit for early data points (<0.6 ns) and the average shear strain relaxes to a near steady state over ~1 ns. For 80 and 125 GPa shocks, the measured shear strains are fully relaxed already at 200 ps, consistent with rapid relaxation associated with the predicted threshold for homogeneous nucleation of dislocations occurring at shock pressure ~65 GPa. The relaxation rate and shear stresses are used to estimate the dislocation density and these quantities are compared to the Livermore Multiscale Strength model as well as various molecular dynamics simulations.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Atomic Weapons Establishment (AWE), Reading (United Kingdom)
- Riverside Research, Beavercreek, OH (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1242000
- Alternate Identifier(s):
- OSTI ID: 1222435
- Report Number(s):
- LLNL-JRNL-673957
Journal ID: ISSN 1098-0121; PRBMDO
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review. B, Condensed Matter and Materials Physics
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 10; Journal ID: ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Wehrenberg, C. E., Comley, A. J., Barton, N. R., Coppari, F., Fratanduono, D., Huntington, C. M., Maddox, B. R., Park, H. -S., Plechaty, C., Prisbrey, S. T., Remington, B. A., and Rudd, R. E. Lattice-level observation of the elastic-to-plastic relaxation process with subnanosecond resolution in shock-compressed Ta using time-resolved in situ Laue diffraction. United States: N. p., 2015.
Web. doi:10.1103/PhysRevB.92.104305.
Wehrenberg, C. E., Comley, A. J., Barton, N. R., Coppari, F., Fratanduono, D., Huntington, C. M., Maddox, B. R., Park, H. -S., Plechaty, C., Prisbrey, S. T., Remington, B. A., & Rudd, R. E. Lattice-level observation of the elastic-to-plastic relaxation process with subnanosecond resolution in shock-compressed Ta using time-resolved in situ Laue diffraction. United States. https://doi.org/10.1103/PhysRevB.92.104305
Wehrenberg, C. E., Comley, A. J., Barton, N. R., Coppari, F., Fratanduono, D., Huntington, C. M., Maddox, B. R., Park, H. -S., Plechaty, C., Prisbrey, S. T., Remington, B. A., and Rudd, R. E. Tue .
"Lattice-level observation of the elastic-to-plastic relaxation process with subnanosecond resolution in shock-compressed Ta using time-resolved in situ Laue diffraction". United States. https://doi.org/10.1103/PhysRevB.92.104305. https://www.osti.gov/servlets/purl/1242000.
@article{osti_1242000,
title = {Lattice-level observation of the elastic-to-plastic relaxation process with subnanosecond resolution in shock-compressed Ta using time-resolved in situ Laue diffraction},
author = {Wehrenberg, C. E. and Comley, A. J. and Barton, N. R. and Coppari, F. and Fratanduono, D. and Huntington, C. M. and Maddox, B. R. and Park, H. -S. and Plechaty, C. and Prisbrey, S. T. and Remington, B. A. and Rudd, R. E.},
abstractNote = {We report direct lattice level measurements of plastic relaxation kinetics through time-resolved, in-situ Laue diffraction of shock-compressed single-crystal [001] Ta at pressures of 27-210 GPa. For a 50 GPa shock, a range of shear strains is observed extending up to the uniaxial limit for early data points (<0.6 ns) and the average shear strain relaxes to a near steady state over ~1 ns. For 80 and 125 GPa shocks, the measured shear strains are fully relaxed already at 200 ps, consistent with rapid relaxation associated with the predicted threshold for homogeneous nucleation of dislocations occurring at shock pressure ~65 GPa. The relaxation rate and shear stresses are used to estimate the dislocation density and these quantities are compared to the Livermore Multiscale Strength model as well as various molecular dynamics simulations.},
doi = {10.1103/PhysRevB.92.104305},
url = {https://www.osti.gov/biblio/1242000},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 10,
volume = 92,
place = {United States},
year = {2015},
month = {9}
}
Web of Science
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