Dynamic material properties of refractory metals: tantalum and tantalum/tungsten alloys
- Experimental Impact Physics Dept. 1433, Sandia National Laboratories, Albuquerque , New Mexico 87185-0821 (United States)
- B-Division, Lawrence Livermore National Laboratory, L-35, P.O. Box 808, Livermore, California 94551 (United States)
We have made a careful set of impact wave-profile measurements (16 profiles) on tantalum and tantalum-tungsten alloys at relatively low stresses (to 15 GPa). Alloys used were Ta{sub 96.5}W{sub 3.5} and Ta{sub 86.5}W{sub 13.5} (wt{percent}) with oxygen contents of 30{endash}70 ppm. Information available from these experiments includes Hugoniot, elastic limits, loading rates, spall strength, unloading paths, reshock structure and specimen thickness effects. Hugoniot and spall properties are illustrated, and are consistent with expectations from earlier work. Modeling the tests with the Steinberg-Guinan-Lund rate-dependent material model provides for an excellent match of the shape of the plastic loading wave. The release wave is not well modeled due to the absence of the dynamic Bauschinger effect. There is also a discrepancy between experiments and calculations regarding the relative timing of the elastic and plastic waves that may be due to texture effects. {copyright} {ital 1996 American Institute of Physics.}
- Research Organization:
- Sandia National Laboratory
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 561705
- Report Number(s):
- CONF-950846--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 370; ISSN 0094-243X; ISSN APCPCS
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comparison of experimental shock-wave profiles for tungsten and computer simulations using a rate-dependent constitutive model
A rate-dependent constitutive model for molybdenum