PLASTIC BEHAVIOR OF POLYCRYSTALLINE TANTALUM IN THE 5 x 10^7/s REGIME [electronic resource].

Published: Washington, D.C. : United States. Dept. of Energy, 2011.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description: PDF-file: 6 pages; size: 0.3 Mbytes
Additional Creators: Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary

The goal of this experiment is to investigate the plastic response of Tantalum to dynamic loading at high strain rates. The samples used were derived from high purity rolled plate, polished down to thicknesses in the range 25-100 {micro}m. Dynamic loading was applied by direct laser ablation of the sample, with pulses up to 10 ns long, at the Jupiter Laser Facility. The elastic-plastic wave structure was measured using two line VISAR systems of different sensitivity, and strain rates were inferred from the rise time of the waves. The elastic wave amplitudes indicated flow stresses between 2 and 3 GPa, depending on the sample thickness. Samples were recovered for post-shot metallographic analysis.

Report Numbers

E 1.99:llnl-proc-492321
llnl-proc-492321

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Published through SciTech Connect.
08/06/2011.
"llnl-proc-492321"
Presented at: American Physical Society Topical Conference on Shock Compression of Condensed Matter, Chicago, IL, United States, Jun 26 - Jul 01, 2011.
El-Dasher, B S; Kumar, M; Collins, G W; Swift, D C; Hammel, B D; Florando, J.

Funding Information

W-7405-ENG-48

View MARC record | catkey: 14061397