THE EFFECT OF MICROSTRUCTURE ON FRACTURE-TOUGHNESS OF POLYCRYSTALLINEALUMINA

Authors
NICOLETTO G TUCCI A ESPOSITO L
Citation
G. Nicoletto et al., THE EFFECT OF MICROSTRUCTURE ON FRACTURE-TOUGHNESS OF POLYCRYSTALLINEALUMINA, Fatigue & fracture of engineering materials & structures, 19(1), 1996, pp. 119-128
Citations number
15
Categorie Soggetti
Material Science","Engineering, Mechanical
Journal title
Fatigue & fracture of engineering materials & structures → ACNP
ISSN journal
8756758X
Volume
19
Issue
1
Year of publication
1996
Pages
119 - 128
Database
ISI
SICI code
8756-758X(1996)19:1<119:TEOMOF>2.0.ZU;2-Q
Abstract
A study of the dependence of the fracture toughness on the microstruct ural morphology of polycrystalline materials is presented. The microst ructure of several aluminas was characterized by thermal etching and i mage analysis. The fracture toughness of these materials was then dete rmined by bridge-indentation pre-cracking followed by a four-point ben ding test procedure. A SEM investigation of the mechanisms of crack pr opagation was also carried out. The observed microstructure-related fr acture toughness responses are discussed.