Plastic deformation in nonstoichiometric UO/sub 2+x/ single crystals - I. Deformation at low temperatures

Journal Article · Fri Apr 01 04:00:00 EST 1988 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(88)90160-5· OSTI ID:7128103

Keller, R J; Mitchell, T E; Heuer, A H

Single crystals of UO/sub 2 + chi/ (5 x 10/sup -6/ less than or equal to chi less than or equal to 10/sup -2/) have been deformed in equilibrium CO/CO/sub 2/ mixtures at 873 K in compression and at 300 K under microhardness indents. The primary glide plane is /111/ under all conditions. The yield stress is independent of chi at 873 K but increases slightly with increasing chi at 300 K. Dislocation substructures consists largely of screw dislocations, indicating that the motion of screw dislocations controls deformation. It is likely that dislocation mobility is controlled by interactions between dislocations and extrinsic defects.

• Research Organization: Precision Castparts Corp., Cleveland, OH (US)
• OSTI ID: 7128103
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 36:4; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702 -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DEFORMATION
INTERACTIONS
KINETICS
LOW TEMPERATURE
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PLASTICITY
REACTION KINETICS
STOICHIOMETRY
URANIUM COMPOUNDS
URANIUM OXIDES