Wave speeds in single-crystal and polycrystalline copper

Journal Article · Fri May 01 00:00:00 EDT 2020 · International Journal of Impact Engineering

DOI:https://doi.org/10.1016/j.ijimpeng.2020.103506· OSTI ID:1598755

Thomas, Sarah A.; Hixson, Robert S.; Hawkins, M. Cameron; Strand, Oliver T.

There is a need in the scientific community to improve predictive hydrodynamic codes. Empirical data are necessary to improve and constrain these models. This work considers the potential differences between the shock Hugoniots of single-crystal and polycrystalline copper. Polycrystalline materials are composed of grains of randomly oriented single crystals, so knowledge of these is necessary to build mesoscale representations of bulk materials. In this work, we measure the shock speeds of three different orientations of single-crystal copper, [100], [110], and [111], as well as polycrystalline copper. Symmetric planar impacts with a “top hat” target design provide timing information for the elastic and plastic waves. We use a comparison of ultrasonically measured ambient longitudinal sound speeds with the elastic wave speeds at pressure to constrain error bars for our analysis. Our results show that differences between the various orientations of single-crystal copper and polycrystalline copper are within the error of the experiment.

• Research Organization: Nevada National Security Site/Mission Support and Test Services LLC (NNSS/MSTS), North Las Vegas, NV (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: NA0003624
• OSTI ID: 1598755
• Alternate ID(s): OSTI ID: 1726009
• Report Number(s): DOE-NV-03624-0530; S0734743X19306712; 103506; PII: S0734743X19306712
• Journal Information: International Journal of Impact Engineering, Journal Name: International Journal of Impact Engineering Vol. 139 Journal Issue: C; ISSN 0734-743X
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Hugoniot
single crystal
copper