Effect of fast-neutron irradiation on the fracture toughness of Alloy A-286

Conference · Mon Feb 01 04:00:00 EST 1982

OSTI ID:5322052

Mills, W J

The effect of fast-neutron irradiation on the fracture toughness behavior of Alloy A-286 was characterized at 24 and 427/sup 0/C using linear-elastic K/sub Ic/ and elastic-plastic J/sub Ic/ fracture mechanics techniques. The fracture toughness was found to decrease continuously with increasing irradiation damage at both test temperatures. In the unirradiated and low fluence conditions, specimens displayed appreciable plasticity prior to fracture, and equivalent K/sub Ic/ values were determined from J/sub Ic/ fracture toughness results. At high irradiation exposure levels, specimens exhibited a brittle K/sub Ic/ fracture mode. The 427/sup 0/C fracture toughness fell from 129 MPa..sqrt..m in the unirradiated condition to 35 MPa..sqrt..m at an exposure of 16.2 dpa (5.2 x 10/sup 22/ n/cm/sup 2/). Room temperature fracture toughness values were consistently 40 to 60% higher than the 427/sup 0/C values. Electron fractography revealed that the reduction in fracture resistance was attributed to a fracture mechanism transition from ductile microvoid coalescence to channel fracture.

• Research Organization: Hanford Engineering Development Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76FF02170
• OSTI ID: 5322052
• Report Number(s): HEDL-SA-2645-FP; CONF-820721-1; ON: DE82017736
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALLOY-A-286
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
BARYONS
CHROMIUM ALLOYS
ELEMENTARY PARTICLES
FAST NEUTRONS
FERMIONS
FRACTURE PROPERTIES
HADRONS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
MATERIALS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NEUTRONS
NICKEL ALLOYS
NUCLEONS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
TITANIUM ALLOYS