Fracture parameters of chevron-notched Al<sub>2</sub>O<sub>3</sub>/Nb sandwich specimens-Reference-Cited by-同舟云学术

Fracture parameters of chevron-notched Al₂O₃/Nb sandwich specimens

Published:2004-09-01 Issue:9 Volume:95 Page:779-784
ISSN:2195-8556
Container-title:International Journal of Materials Research
language:en
Short-container-title:

Author:

Bartsch Martin¹,Zhang Zhe-Feng²,Scheu Christina²³,Rühle Manfred²,Messerschmidt Ulrich¹

Affiliation:

1. Max-Planck-Institut für Mikrostrukturphysik, Halle (Saale), Germany

2. Max-Planck-Institut für Metallforschung, Stuttgart, Germany

3. Materialprüfungsanstalt, Universität Stuttgart, Stuttgart, Germany

Abstract

Abstract Fracture toughness tests were performed on Al2O3/Nb sandwich specimens using chevron-notched bending bars. These tests allow the independent determination of the fracture toughness K c at a defined crack velocity and the total work of fracture J c. The J c values are much greater than the data for the energy release rate G c following from K c. The fracture surfaces were studied by optical and scanning electron microscopy. The results are discussed in terms of the fracture toughness of cleavage in the Al2O3 and severe plastic deformation in the Nb sheet.

Publisher

Walter de Gruyter GmbH

Subject

Materials Chemistry,Metals and Alloys,Physical and Theoretical Chemistry,Condensed Matter Physics

Link

https://www.degruyter.com/document/doi/10.1515/ijmr-2004-0146/pdf

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