Disolocation behavior and the yield stress in neutron-irradiated MgO

Journal Article · Mon Jul 01 04:00:00 EDT 1963 · Journal of Applied Physics (U.S.)

DOI:https://doi.org/10.1063/1.1729701· OSTI ID:4659208

Stablein, P F

Mechanical property measurements on neutron-irradiated MgO single crystals show that hardening is caused by fast neutrons exclusively. Microhardness measurements, followed by etching to reveal dislocation distribution, permit an analysis of plastic flow even on samples that are so embrittled by the irradiation (with a dose of 10¹⁹ nvt) that it was not possible to bend them. As determined from 3-point bending experiments on samples annealed at temperatures up to 1200°C, it does require an increasingly higher stress to form a dislocation (source hardening) as well as to move it through the damaged lattice (friction hardening). The type of defects responsible for such behavior are discussed.

• Research Organization: Argonne National Lab., Ill.
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-037583
• OSTI ID: 4659208
• Journal Information: Journal of Applied Physics (U.S.), Journal Name: Journal of Applied Physics (U.S.) Vol. Vol: 34; ISSN JAPIA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
BRITTLENESS
CREEP
DEFECTS
DISLOCATIONS
DISTRIBUTION
ELASTICITY
ETCHING
FAST NEUTRONS
FRICTION
HARDNESS
HIGH TEMPERATURE
LATTICES
MAGNESIUM OXIDES
MATERIALS TESTING
MEASURED VALUES
MECHANICAL PROPERTIES
RADIATION DOSES
RADIATION EFFECTS
SAMPLING
STRESSES