Kounga Njiwa, Alain Brice ; Galal Yousef, Susan ; Fett, Theo ; Rödel, Jürgen (2005)
Influence of microcracking on crack-tip toughness of alumina.
In: Engineering Fracture Mechanics, 72 (7)
doi: 10.1016/j.engfracmech.2004.09.004
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Al2O3-samples with different grain sizes were produced and the crack-tip toughness KI0, also called intrinsic fracture toughness, was determined using two different measurement techniques. It appeared that KI0 depends strongly on specimen grain size with the mechanistic link provided by the increase of microcrack density with grain size. Results obtained using measurements of crack opening displacements (COD) lie considerably lower than values based on a method using bending tests of pre-notched bend bars. It is suggested that the latter method relies on the use of a notch with a microcrack, which in fact is different than the behavior of a long crack alone.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2005 |
| Autor(en): | Kounga Njiwa, Alain Brice ; Galal Yousef, Susan ; Fett, Theo ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Influence of microcracking on crack-tip toughness of alumina |
| Sprache: | Englisch |
| Publikationsjahr: | Mai 2005 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Engineering Fracture Mechanics |
| Jahrgang/Volume einer Zeitschrift: | 72 |
| (Heft-)Nummer: | 7 |
| DOI: | 10.1016/j.engfracmech.2004.09.004 |
| Kurzbeschreibung (Abstract): | Al2O3-samples with different grain sizes were produced and the crack-tip toughness KI0, also called intrinsic fracture toughness, was determined using two different measurement techniques. It appeared that KI0 depends strongly on specimen grain size with the mechanistic link provided by the increase of microcrack density with grain size. Results obtained using measurements of crack opening displacements (COD) lie considerably lower than values based on a method using bending tests of pre-notched bend bars. It is suggested that the latter method relies on the use of a notch with a microcrack, which in fact is different than the behavior of a long crack alone. |
| Freie Schlagworte: | Fracture; Intrinsic toughness; COD; Microcracks |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 20 Jun 2011 11:48 |
| Letzte Änderung: | 05 Mär 2013 09:48 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum