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
Article, Bibliographie
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 1999 |
| Creators: | Hoffman, Markus ; Skirl, Siegfried ; Pompe, Waldemar ; Rödel, Jürgen |
| Type of entry: | Bibliographie |
| Title: | Thermal residual strains and stresses in Al2O3/Al composites with interpenetrating networks |
| Language: | English |
| Date: | January 1999 |
| Journal or Publication Title: | Acta Materialia |
| Volume of the journal: | 47 |
| Issue Number: | 2 |
| DOI: | 10.1016/S1359-6454(98)00367-X |
| 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. |
| Uncontrolled Keywords: | CERAMICS; METALS; PARTICLES; STRENGTH; ALUMINA; CREEP |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials 11 Department of Materials and Earth Sciences > Department of Earth Sciences (1999 merged into Department of Materials and Earth Sciences) |
| Date Deposited: | 19 Nov 2008 15:58 |
| Last Modified: | 20 Feb 2020 13:29 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Send an inquiry |
Options (only for editors)
 |
Show editorial Details |
Drucken
Impressum