Dynamical behavior of octahedrite from the Henbury meteorite
- Experimental Impact Physics Dept. 1433, Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
- MST-5, G730, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Quantametrics, Inc., Brackenwood Path, Head of the Harbor, St. James, New York 11780 (United States)
A suite of dynamic property measurements and characterization studies on an iron-nickel single crystal from the Henbury octahedrite containing Widmanstaetten intergrowths of kamacite and taenite (initial density 7.810) has been performed. These measurements include six impact tests (wave profile compression/release) over the stress range 2--20 GPa, metallography, quasi-static and Hopkinson bar mechanical testing, and ultrasonic mapping and sound velocity measurements. A cryogenic impact test was included to evaluate effects of a brittle/ductile transition which has been reported at 200 K. Temperature sensitivity of the dynamic behavior was measured at high and low strain rates. The impact test results show loading strength (HEL), Hugoniot and [alpha][r arrow][epsilon] transition signatures to be similar to those for Armco iron, and do not show evidence for a ductile-brittle transition at these extremely high strain rates. Metallographic analyses, quasi-static and Hopkinson bar testing suggest that the material is in a work-hardened state and that kamacite properties dominate the bulk octahedrite properties. [copyright] 1994 American Institute of Physics
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 7019601
- Report Number(s):
- CONF-921145-; CODEN: APCPCS
- Journal Information:
- AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 309:1; Conference: Production and neutralization of negative ions and beams, Upton, NY (United States), 9-13 Nov 1992; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
IRON METEORITES
IMPACT TESTS
AMBIENT TEMPERATURE
BRITTLE-DUCTILE TRANSITIONS
STRAIN RATE
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
ULTRASONIC WAVES
VERY HIGH PRESSURE
WAVE FORMS
MATERIALS TESTING
MECHANICAL TESTS
METEORITES
SOUND WAVES
TEMPERATURE RANGE
TESTING
360103* - Metals & Alloys- Mechanical Properties