Chraracteristics of crack growth of alumina ceramics under cyclic loads

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Characteristics of crack growth under cyclic loading for alumina ceramics have been investigated. Three alumina ceramics with different grain size were fabricated by hot-pressing. Cyclic fatigue tests were carried out using four-point bend specimen. From examination of crack path and microstructural behavior from the tested specimens, grain bridging along the crack interface and intergranular fracture mode at the fracture surface were observed. The crack growth rate curve presented by using the cyclic parameter, DeltaK(eff)(*)/(1-K-max/K-IC), could be divided into three regions. These-regions were closely related to the fraction of intergranular fracture area. Crack,closure influencing the cyclic parameter was evaluated as a function of stress ratio.
Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
Issue Date
2003-04
Language
English
Article Type
Article; Proceedings Paper
Keywords

SILICON-CARBIDE; FATIGUE; BEHAVIOR

Citation

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, v.17, no.8-9, pp.1737 - 1743

ISSN
0217-9792
DOI
10.1142/S0217979203019599
URI
http://hdl.handle.net/10203/82252
Appears in Collection
ME-Journal Papers(저널논문)
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