Influence of oxygen on defect clusters, radiation hardening, and radiation- anneal hardening in vanadium

Conference · Wed Jan 01 04:00:00 EST 1975

OSTI ID:4190002

Wechsler, M S; Bajaj, R

On increasing the oxygen concentration, the defect cluster density in neutron-irradiated vanadium increases, the average size decreases, and the stability against annealing increases. Higher oxygen concentrations in vanadium also have the effect of increasing the radiation hardening and radiation-anneal hardening. Based on a dispersed barrier model embracing defect clusters of all sizes, the radiation-anneal hardening is due principally to a strengthening of the defect clusters as barriers to slip dislocation motion, not to changes in the density and size distribution of the defect clusters. The observations are consistent with the nucleation of defect clusters by small oxygen or oxygen-point defect complexes upon irradiation and the trapping of oxygen at defect clusters upon post-irradiation annealing. (auth)

• Research Organization: Ames Lab., Iowa (USA)
• NSA Number: NSA-33-001325
• OSTI ID: 4190002
• Report Number(s): IS-M--46; CONF-750952--1
• Country of Publication: United States
• Language: English

Related Subjects

*OXYGEN-- METALLURGICAL EFFECTS
*VANADIUM-- PHYSICAL RADIATION EFFECTS
360106* --Materials--Metals & Alloys--Radiation Effects
ANNEALING
CRYSTAL DEFECTS
FAST NEUTRONS
N50240* --Metals
Ceramics
& Other Materials--Metals & Alloys--Radiation Effects
NEUTRON BEAMS
RADIATION HARDENING