The correlation between microstructure and thermomechanical properties studied on AlCuMg-based alloys

U. SCHMIDT; R. UNGER

doi:doi:10.1051/jp4:1993730

Issue		J. Phys. IV France Volume 03, Number C7, Novembre 1993 The 3rd European Conference on Advanced Materials and Processes Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés


Page(s)		C7-197 - C7-205
DOI		https://doi.org/10.1051/jp4:1993730

The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-197-C7-205
DOI: 10.1051/jp4:1993730

The correlation between microstructure and thermomechanical properties studied on AlCuMg-based alloys

U. SCHMIDT and R. UNGER

Martin Luther University of Halle-Wittenberg, Department of Physics, 06099 Halle, Germany

Abstract
This paper deals with the description of the structure and precipitation sequence of AlCu4.5 alloys with a content of Mg between those of binary AlCu and quasi-binary AlCuMg alloys. For alloys with a small Mg content (0.23 wt%) these are the coherent Cu-like GP zones and the incoherent θ' and θ phases with the adequate content of dissolved Mg, so the precipitation sequence can be essentially realized without any difficulties. In the case of higher Mg concentration a re-orientation occurs because it requires both time and energy. An undisturbed transition to the θ (Mg) phase is impossible. The phase structure becomes more similar to that of the S phase but it is not safe to say that it is already a quasi-binary structure. The different size developments between the AlCu4.5 and AlCuMg0.98 alloys are discussed.