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Micromechanical Modelling of Advanced Ceramics Using Statistically Representative Microstructures
Date Issued
2013-09
Date Available
2014-09-29T09:46:03Z
Abstract
Advanced ceramics are a class of materials used as cutting tools in some of the most demanding material removal operations. Their high hardness makes them extremely suited for use at these extreme conditions. However they have a relatively low fracture toughness when compared to other conventional tool materials. A combined experimental-numerical method was used to investigate the role of microstructure on the fracture of advanced ceramics. In particular, the effect of grain size and matrix content were examined. Representative finite volume (FV) microstructures were created using Voronoi tessellation. It is shown, by comparing with real micrographs, that the method captures the features of real microstructures in terms of grain size distribution and grain aspect ratio. It was found that the underlying microstructure significantly affects the failure of this class of materials. Furthermore, it was found that by altering the microstructural parameters in the numerical model, such as grain size and matrix cont, it is possible to specify material improvements.
Type of Material
Journal Article
Publisher
Trans Tech Publications
Journal
Key Engineering Materials
Volume
577-578
Start Page
53
End Page
56
Copyright (Published Version)
2013 Trans Tech Publications
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
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Owning collection
Scopus© citations
0
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