Variability in Dynamic Properties of Tantalum: Spall, Hugoniot Elastic Limit and Attenuation

Journal Article · Fri Jul 28 00:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2263397· OSTI ID:20875743

Furnish, M D; Reinhart, W D; Trott, W M; Chhabildas, L C; Vogler, T J ^[1]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185-1181 (United States)

A suite of impact experiments was conducted to assess spatial and shot-to-shot variability in dynamic properties of tantalum. Samples had a uniform refined {approx} 20 micron grain structure with a strong axisymmetric [111] crystallographic texture. An HEL amplitude of 2.8 GPa (corresponding to Y {approx_equal} 1.5 GPa) was observed. Free-surface spall experiments showed clear wave attenuation and spallation phenomena. Here, loading stresses were {approx} 12.5 GPa and various ratios of impactor to target thicknesses were used. Spatial and shot-to-shot variability of the spall strength was {+-}20%, and of the HEL, {+-}10%. Experiments conducted with smaller diameter flyer plates clearly showed edge effects in the line and point VISAR records, indicating lateral release speeds of roughly 5 km/s.

• OSTI ID: 20875743
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 845; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMPLITUDES
ATTENUATION
AXIAL SYMMETRY
ELASTICITY
EQUATIONS OF STATE
FRACTURE PROPERTIES
IMPACT TESTS
LOADING
PLATES
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
SPALLATION
STRESSES
SURFACES
TANTALUM
TEXTURE
THICKNESS
VELOCITY