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Role of Concurrent Cavitation in the Fracture of a Superplastic Zirconia—Alumina Composite
Author(s) -
Chokshi Atul H.,
Nieh TaiGang,
Wadsworth Jeffrey
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb06944.x
Subject(s) - superplasticity , cavitation , materials science , composite number , cubic zirconia , composite material , deformation (meteorology) , ductility (earth science) , ultimate tensile strength , elongation , metallurgy , ceramic , microstructure , creep , physics , mechanics
Superplastic zirconia‐alumina composites exhibit very large elongations to failure of ≳500% under optimum conditions. A quantitative microstructural study reveals that the composite is susceptible to considerable internal cavitation, with the level of cavitation increasing with increasing strain rate. The observed inverse relationship between the level of cavitation and the elongation to failure suggests strongly that the tensile ductility is limited by the evolution of cavitation damage during superplastic deformation.