Fracture toughness of MgO-partially-stabilized ZrO/sub 2/ specimens with K/sub R/-curve behavior from transformation toughening

Journal Article · Sat Mar 01 04:00:00 EST 1986 · J. Am. Ceram. Soc.; (United States)

OSTI ID:5684971

Burns, S J; Swain, M V

Transformation-toughened MgO-partially-stabilized ZrO/sub 2/ exhibits a crack-wake-induced load-point displacement in fracture samples. The equations of linear elastic fracture mechanics were self-consistently reformulated to include the residual displacement from the transformation wake. Application of these equations to double-cantilever-beam specimens of transformation-toughened ZrO/sub 2/, with the martensitic start transformation temperature close to the testing temperature, gives a decreasing K/sub R/ curve and initial toughness values near 30 MPa.m/sup 1/2/.

• Research Organization: Materials Science Program, Dept. of Mechanical Engineering, Univ. of Rochester, Rochester, NY 14627
• OSTI ID: 5684971
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 69:3; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CARBON ADDITIONS
CERAMICS
CHALCOGENIDES
CRACK PROPAGATION
DIAGRAMS
ELASTICITY
EQUATIONS
FRACTURE PROPERTIES
HIGH PRESSURE
IRON ALLOYS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MARTENSITE
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
STABILIZATION
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES