PLASTIC BEHAVIOR OF POLYCRYSTALLINE TANTALUM IN THE 5 x 10^7/s REGIME

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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, ... continued below

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6 p. (0.3 MB)

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Hammel, B D; Swift, D C; El-Dasher, B S; Kumar, M; Collins, G W & Florando, J August 6, 2011.

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Description

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.

Physical Description

6 p. (0.3 MB)

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PDF-file: 6 pages; size: 0.3 Mbytes

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  • Presented at: American Physical Society Topical Conference on Shock Compression of Condensed Matter, Chicago, IL, United States, Jun 26 - Jul 01, 2011

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  • Report No.: LLNL-PROC-492321
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1022946
  • Archival Resource Key: ark:/67531/metadc835059

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  • August 6, 2011

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  • May 19, 2016, 3:16 p.m.

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  • April 13, 2017, 6:23 p.m.

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Hammel, B D; Swift, D C; El-Dasher, B S; Kumar, M; Collins, G W & Florando, J. PLASTIC BEHAVIOR OF POLYCRYSTALLINE TANTALUM IN THE 5 x 10^7/s REGIME, article, August 6, 2011; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc835059/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.