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Fracture behaviour in fibre reinforced ceramics

Hoffmann, Michael J. ; Fiedler, Udo ; Emmel, Thomas ; Prielipp, Helge ; Claussen, Nils ; Gross, Dietmar ; Rödel, Jürgen (1997)
Fracture behaviour in fibre reinforced ceramics.
In: Acta Materialia, 45 (9)
doi: 10.1016/S1359-6454(97)00057-8
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

The aim of the work is to gain a better understanding of the microprocesses involved in the fracture of ductile phase reinforced CMCs with an interpenetrating network microstructure, especially the processes involved in deformation and fracture of the ductile phase and its subsequent influence upon overall mechanical performance of the material. A model material is produced comprising regularly orientated aluminium fibres located within an alumina matrix. Compact tension samples, each produced with fibres orientated at 30 degrees, 60 degrees or 90 degrees to the fracture plane, are used to produce crack growth resistance curves and are then sliced to produce samples which are used to test the stress-extension, sigma(mu); behaviour of the ductile fibres. Fracture surfaces are analysed within the SEM. The sigma(mu) behaviour and fracture process of the fibres is modelled using both a dislocation pile-up model and FEM analysis. Comparison is made with a geometric ductile deformation model from the literature. The models are found to describe well the sigma(mu) experimental data and also the crack growth resistance results. II is found that ductile phase deformation and fracture is highly sensitive to the level of mechanical constraint upon the fibre. This is influenced by factors such as the porosity in the fibre, the interface strength and fibre orientation relative to the crack plane. Fibre diameter significantly affects sigma(mu) behaviour also. (C) 1997 Acta Metallurgica Inc.

Typ des Eintrags: Artikel
Erschienen: 1997
Autor(en): Hoffmann, Michael J. ; Fiedler, Udo ; Emmel, Thomas ; Prielipp, Helge ; Claussen, Nils ; Gross, Dietmar ; Rödel, Jürgen
Art des Eintrags: Bibliographie
Titel: Fracture behaviour in fibre reinforced ceramics
Sprache: Englisch
Publikationsjahr: September 1997
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Acta Materialia
Jahrgang/Volume einer Zeitschrift: 45
(Heft-)Nummer: 9
DOI: 10.1016/S1359-6454(97)00057-8
Kurzbeschreibung (Abstract):

The aim of the work is to gain a better understanding of the microprocesses involved in the fracture of ductile phase reinforced CMCs with an interpenetrating network microstructure, especially the processes involved in deformation and fracture of the ductile phase and its subsequent influence upon overall mechanical performance of the material. A model material is produced comprising regularly orientated aluminium fibres located within an alumina matrix. Compact tension samples, each produced with fibres orientated at 30 degrees, 60 degrees or 90 degrees to the fracture plane, are used to produce crack growth resistance curves and are then sliced to produce samples which are used to test the stress-extension, sigma(mu); behaviour of the ductile fibres. Fracture surfaces are analysed within the SEM. The sigma(mu) behaviour and fracture process of the fibres is modelled using both a dislocation pile-up model and FEM analysis. Comparison is made with a geometric ductile deformation model from the literature. The models are found to describe well the sigma(mu) experimental data and also the crack growth resistance results. II is found that ductile phase deformation and fracture is highly sensitive to the level of mechanical constraint upon the fibre. This is influenced by factors such as the porosity in the fibre, the interface strength and fibre orientation relative to the crack plane. Fibre diameter significantly affects sigma(mu) behaviour also. (C) 1997 Acta Metallurgica Inc.

Freie Schlagworte: INTERPENETRATING NETWORKS; COMPOSITES; ALUMINA; ALLOYS; STRENGTH; INTERFACES; TOUGHNESS; GROWTH; MATRIX
Fachbereich(e)/-gebiet(e): Studienbereiche
11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe
Studienbereiche > Studienbereich Mechanik
Hinterlegungsdatum: 19 Nov 2008 16:03
Letzte Änderung: 20 Feb 2020 13:30
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