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Influence of the Dispersoid Material and Forming Process on the Creep Behaviour of Dispersion Strengthened Aluminium
Author(s) -
ElMagd E.,
Ismail Y.,
Brockmann G.J.,
Baumgarten J.
Publication year - 1997
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.19970280111
Subject(s) - creep , materials science , aluminium , dispersion (optics) , metallurgy , stress (linguistics) , pressing , composite material , hot isostatic pressing , work (physics) , alloy , thermodynamics , linguistics , philosophy , optics , physics
The effect of small percentages of Al4C3 and Al2O3 in dispersion hardened aluminium on the creep behaviour has been investigated. A comparative study was conducted on the group of AlC3Ol and AlC2O2. These two groups were produced by cold isostatic pressing (CIP), but the second group was produced by four several methods of powder forming processes. Creep rupture properties in these alloys were characterized in terms of the stress and temperature dependence of minimum creep strain rate ε min , rupture lives t R and creep rate parameter α. Within the stress ranges used in this work, the stress dependence of both ε min and t R at various temperatures of these groups can be represented by power laws:\documentclass{article}\pagestyle{empty}\begin{document}$$ \dot \varepsilon _{{\rm min}} = Co^n {\rm and }t_R = M\sigma ^{ - P} $$\end{document} .