Hoffman, Markus ; Skirl, Siegfried ; Pompe, Waldemar ; Rödel, Jürgen (1999)
Thermal residual strains and stresses in Al2O3/Al composites with interpenetrating networks.
In: Acta Materialia, 47 (2)
doi: 10.1016/S1359-6454(98)00367-X
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Thermal expansion data for Al2O3/Al interpenetrating network composites, obtained using a dilatometer, are analysed to determine the residual stress during, and after, thermal cycling between room temperature and 600 degrees C. A rigorous technique, using the effective medium approximation method, is applied, utilizing unconstrained thermal strains of the individual phases which are determined experimentally. Coefficients of thermal expansion are predicted as a function of metal content and temperature. Residual stresses are calculated using two approaches: (1) a "macroscopic" approach which considers total composite strain and (2) a "micromechanical" approach which considers time dependent effects in the metal phase. Predictions agree well with experimental data and neutron diffraction measurements, and provide a mechanistic understanding of the thermo-mechanical behaviour of the material. (C) 1999 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 1999 |
| Autor(en): | Hoffman, Markus ; Skirl, Siegfried ; Pompe, Waldemar ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Thermal residual strains and stresses in Al2O3/Al composites with interpenetrating networks |
| Sprache: | Englisch |
| Publikationsjahr: | Januar 1999 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 47 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1016/S1359-6454(98)00367-X |
| Kurzbeschreibung (Abstract): | Thermal expansion data for Al2O3/Al interpenetrating network composites, obtained using a dilatometer, are analysed to determine the residual stress during, and after, thermal cycling between room temperature and 600 degrees C. A rigorous technique, using the effective medium approximation method, is applied, utilizing unconstrained thermal strains of the individual phases which are determined experimentally. Coefficients of thermal expansion are predicted as a function of metal content and temperature. Residual stresses are calculated using two approaches: (1) a "macroscopic" approach which considers total composite strain and (2) a "micromechanical" approach which considers time dependent effects in the metal phase. Predictions agree well with experimental data and neutron diffraction measurements, and provide a mechanistic understanding of the thermo-mechanical behaviour of the material. (C) 1999 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved. |
| Freie Schlagworte: | CERAMICS; METALS; PARTICLES; STRENGTH; ALUMINA; CREEP |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Fachbereich Materialwissenschaft (1999 aufgegangen in 11 Fachbereich Material- und Geowissenschaften) |
| Hinterlegungsdatum: | 19 Nov 2008 15:58 |
| Letzte Änderung: | 20 Feb 2020 13:29 |
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