EFFECTS OF GAMMA-RAY IRRADIATION ON THE MECHANICAL PROPERTIES OF NaCl SINGLE CRYSTALS

Technical Report · Tue Jan 01 00:00:00 EST 1963

OSTI ID:4139799

Agullo-Lopez, F; Levy, P W

The plastic behavior of both unirradiated and gamma-ray irradiated NaCl single crystals was studied with a variety of techniques. These include the determination of stressstrain curves, and photoelastic, surface, topography, and F-center absouption band measurements. The different stages of deformation in unirradiated crystals are compared with the corresponding stages of irradiated ones. One effect is that irradiation greatly extends the easy glide region. Some insight into this behavior is obtained from the photoelastic and topography measurements. In unirradiated crystals, almost all glide occurs on one slip system and there is considerable pile up. In irradiated crystals, slip occurs on two perpendicular systems, the number of operating glide planes is, at least, doubled, and the pile up is very much reduced. Both the yield point and F-center concentration increase rapidly with dose up to approximately 10/sup 7/ r andd at a much slower rate for larger doses. Also investigated was the effect of crystal shape (or geometry) on the stress strain curves obtained from unirradiated crystals. The most interesting results are that the yield point decreases with increasing cross section and that the slope of the linear strain hardening region depends on the ratio of the crystals shortest dimension to its height. (auth)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• DOE Contract Number: AT-30-2-GEN-16
• NSA Number: NSA-18-007281
• OSTI ID: 4139799
• Report Number(s): BNL-7502; CONF-159-1
• Resource Relation: Other Information: From Proceedings of the British Ceramic Society Meeting on Point Defects in Non-Metallic Solids, Leamington Spa# England, Oct. 1963. Orig. Receipt Date: 31-DEC-64
• Country of Publication: United States
• Language: English

Related Subjects

METALS, CERAMICS, AND OTHER MATERIALS
ABSORPTION
CONFIGURATION
CROSS SECTIONS
DEFECTS
DEFORMATION
DIAGRAMS
GAMMA RADIATION
GEOPHYSICS
MAPS
MEASURED VALUES
MECHANICAL PROPERTIES
MONOCRYSTALS
PHOTOELASTICITY
POLARIZATION
RADIATION DOSES
RADIATION EFFECTS
SLIP
SODIUM CHLORIDES
STRESSES
SURFACES
TEMPERING
TOPOGRAPHY