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Title: Probing the character of ultra-fast dislocations

Abstract

In collaboration with LLNL and Caltech, experiments to test the strain rate and texture dependence of spall strength in tantalum were conducted at Janus in the Jupiter Laser Facility at LLNL from June-July 2014. Part of the laser shots were dedicated to reproducing data from the last set of spall experiments in 2012 and the rest of the laser shots were dedicated to produce new science on spall strength. Experiments were also conducted at the Omega Facility (LLE, U. of Rochester). The limits of spall strength were tested by increasing the strain rate and changing the texture of the samples. This research was successfully completed and a paper has just appeared in Acta materialia. Four papers on amorphization in Si, Ge, B4C, and SiC were published in leading journals. We have now demonstrated that amorphization is an important mechanism of inelastic deformation in covalently bonded solids under shock compression.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); National Scientific and Technical Research Council (CONICET)
OSTI Identifier:
1462268
Report Number(s):
LLNL-JRNL-678383
Journal ID: ISSN 2045-2322; PII: BFsrep16892
Grant/Contract Number:  
AC52-07NA27344; PICT-PRH-0092; NA0002080
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English

Citation Formats

Ruestes, C. J., Bringa, E. M., Rudd, R. E., Remington, B. A., Remington, T. P., and Meyers, M. A. Probing the character of ultra-fast dislocations. United States: N. p., 2015. Web. doi:10.1038/srep16892.
Ruestes, C. J., Bringa, E. M., Rudd, R. E., Remington, B. A., Remington, T. P., & Meyers, M. A. Probing the character of ultra-fast dislocations. United States. doi:10.1038/srep16892.
Ruestes, C. J., Bringa, E. M., Rudd, R. E., Remington, B. A., Remington, T. P., and Meyers, M. A. Mon . "Probing the character of ultra-fast dislocations". United States. doi:10.1038/srep16892. https://www.osti.gov/servlets/purl/1462268.
@article{osti_1462268,
title = {Probing the character of ultra-fast dislocations},
author = {Ruestes, C. J. and Bringa, E. M. and Rudd, R. E. and Remington, B. A. and Remington, T. P. and Meyers, M. A.},
abstractNote = {In collaboration with LLNL and Caltech, experiments to test the strain rate and texture dependence of spall strength in tantalum were conducted at Janus in the Jupiter Laser Facility at LLNL from June-July 2014. Part of the laser shots were dedicated to reproducing data from the last set of spall experiments in 2012 and the rest of the laser shots were dedicated to produce new science on spall strength. Experiments were also conducted at the Omega Facility (LLE, U. of Rochester). The limits of spall strength were tested by increasing the strain rate and changing the texture of the samples. This research was successfully completed and a paper has just appeared in Acta materialia. Four papers on amorphization in Si, Ge, B4C, and SiC were published in leading journals. We have now demonstrated that amorphization is an important mechanism of inelastic deformation in covalently bonded solids under shock compression.},
doi = {10.1038/srep16892},
journal = {Scientific Reports},
number = 1,
volume = 5,
place = {United States},
year = {2015},
month = {11}
}

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