Influence of shear bands on creep rupture in ceramics

Journal Article · Mon Dec 31 23:00:00 EST 1984 · J. Am. Ceram. Soc.; (United States)

OSTI ID:5079127

Dalgleish, B J; Evans, A G

Observations of damage during the creep rupture of polycrystalline alumina have revealed an important influence of shear bands on the failure process. The shear bands are regions of appreciable damage, consisting of high densities of facetsized cavities. The cavities within the bands become crack nuclei at shear band intersections and crack coalescence sites during the final stage of failure. Further understanding of shear bands and shear band damage is needed to permit the development of quantitative expressions for the rupture times measured for this material.

• Research Organization: University of California, Lawrence Berkeley Laboratory and Department of Materials Science and Mineral Engineering, Materials and Molecular Research Division, Berkeley, California
• OSTI ID: 5079127
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 68:1; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CAVITIES
CERAMICS
CHALCOGENIDES
CREEP
CRYSTALS
DENSITY
FAILURES
FRACTURE MECHANICS
MEASURING METHODS
MECHANICAL PROPERTIES
MECHANICS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
RUPTURES
SHEAR
TIME DEPENDENCE