A study of the dependence of the fracture toughness on the microstructural morphology of polycrystalline materials is presented. The microstructure of several aluminas was characterized by thermal etching and image analysis. The fracture toughness of these materials was then determined by bridge-indentation pre-cracking followed by a four-point bending test procedure. A SEM investigation of the mechanisms of crack propagation was also carried out. The observed microstructure-related fracture toughness responses are discussed.
THE EFFECT OF MICROSTRUCTURE ON FRACTURE TOUGHNESS OF POLYCRYSTALLINE ALUMINA / Nicoletto, Gianni; A., Tucci; L., Esposito. - In: FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES. - ISSN 8756-758X. - 19:(1996), pp. 119-128. [10.1111/j.1460-2695.1996.tb00937.x]
THE EFFECT OF MICROSTRUCTURE ON FRACTURE TOUGHNESS OF POLYCRYSTALLINE ALUMINA
NICOLETTO, Gianni;
1996-01-01
Abstract
A study of the dependence of the fracture toughness on the microstructural morphology of polycrystalline materials is presented. The microstructure of several aluminas was characterized by thermal etching and image analysis. The fracture toughness of these materials was then determined by bridge-indentation pre-cracking followed by a four-point bending test procedure. A SEM investigation of the mechanisms of crack propagation was also carried out. The observed microstructure-related fracture toughness responses are discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
