Alternatives to a power-law creep model for rock salt at temperatures below 160/sup 0/C

Conference · Sun Jan 01 00:00:00 EST 1984

OSTI ID:6338024

Wawersik, W R

Five sets of steady state creep estimates for rock salt were analyzed to compare the results of power-law fits for dislocation climb with the fits by models for cross-slip, glide, and a combination of cross-slip and climb. It was determined that a cross-slip model yields the mechanistically most credible fit with activation energies and activation areas matching those published for NaCl single crystals. High power-law stress exponents also ruled out the possibility that pressure solution and recrystallization played a major role to the lowest recorded strain rates on the order of 10/sup -10/ s/sup -1/. The conclusion concerning cross-slip as the rate controlling step during creep of rock salt below 160/sup 0/C is consistent with many glide related microstructural features in samples deformed in the laboratory at or below 110/sup 0/C. It is emphasized, however, that the role of cross-slip does not imply the absence of other mechanisms including dislocation climb and subgrain formation but merely suggests that they are not dominant. 58 refs., 6 figs., 4 tabs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6338024
• Report Number(s): SAND-85-2453C; CONF-8409302-1; ON: DE86003917
• Resource Relation: Conference: 2. conference on mechanical behavior of salt, Hannover, F.R. Germany, 24 Sep 1984
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
02 PETROLEUM
HALITE
CREEP
MATHEMATICAL MODELS
PETROLEUM
RADIOACTIVE WASTE DISPOSAL
SODIUM CHLORIDES
UNDERGROUND STORAGE
ALKALI METAL COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HALIDE MINERALS
HALIDES
HALOGEN COMPOUNDS
MANAGEMENT
MECHANICAL PROPERTIES
MINERALS
SODIUM COMPOUNDS
STORAGE
WASTE DISPOSAL
WASTE MANAGEMENT
580300* - Mineralogy
Petrology
& Rock Mechanics- (-1989)
052002 - Nuclear Fuels- Waste Disposal & Storage
024000 - Petroleum- Storage- (-1989)