Fracture behavior of vanadium/vanadium silicide in-situ composites

Conference · Mon Nov 30 04:00:00 EST 1992

OSTI ID:6397153

Strum, M J; Henshall, G A

The fracture behavior of V-V[sub 3]Si in-situ composite alloys has been evaluated for intermetallic phase fractions of 30, 50, and 70 volume percent. In addition, the mechanical properties of the ductile constituent in these composites have been evaluated from two alloys containing silicon at its solubility-limit in vanadium at the eutectic temperature and at 1400[degrees]C. The fracture toughness was found to increase monotonically with increasing volume fraction of ductile phase. Fractography has shown evidence of crack bridging by the vanadium solid solution phase and increased ductility within the composite relative to bulk measurements. The toughness results are compared with predictions based on an existing model of ductile-phase toughening using our measurements of component properties.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6397153
• Report Number(s): UCRL-JC-112408; CONF-921101--119; ON: DE93013422
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALLOYS
COMPOSITE MATERIALS
CRACKS
CRYSTAL STRUCTURE
DUCTILITY
FRACTOGRAPHY
FRACTURE PROPERTIES
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
SILICIDES
SILICON COMPOUNDS
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VANADIUM ALLOYS
VANADIUM COMPOUNDS
VANADIUM SILICIDES