Effect of shock pressure and temperature on the deformation microstructure of rutile
Annealed high purity rutile powders were shock loaded to peak pressures between 5 and 22 GPa and peak temperatures between 80 and 500/sup 0/C, and then examined by transmission electron microscopy. Unusually large concentrations of dislocations were observed even at the lowest pressure. They increased in density rapidly with peak pressure, exceeding 10/sup 11/cm./sup -2/ above 8 GPa. Twinning was present at all pressures, but was more difficult to discern amid the dense substructure at higher pressures. Cleavage was common at 5 to 8 GPa, but rare at higher pressures. Recrystallized grains were observed at 16 GPa and 500/sup 0/C. The occurrence of slip or twinning was affected by crystal orientation. Particle size and grain size were not significantly altered by shock compression. Slip on (100) planes was observed for the first time for this material. Crystallographic shear defects were not observed. 18 refs., 9 figs., 1 tab.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5446174
- Report Number(s):
- SAND-85-1661C; CONF-850770-4; ON: DE85016577
- Resource Relation:
- Conference: EXPLOMET '85 - international conference on metallurgical applications of shock wave and high strain-rate phenomena, Portland, OR, USA, 28 Jul 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
RUTILE
MICROSTRUCTURE
PRESSURE EFFECTS
TEMPERATURE EFFECTS
DEFORMATION
EXPERIMENTAL DATA
HIGH TEMPERATURE
IMPACT SHOCK
MEDIUM TEMPERATURE
POWDERS
SHOCK WAVES
TRANSMISSION ELECTRON MICROSCOPY
VERY HIGH PRESSURE
CHALCOGENIDES
CRYSTAL STRUCTURE
DATA
ELECTRON MICROSCOPY
INFORMATION
MATERIALS
MICROSCOPY
MINERALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies