PT  - JOURNAL ARTICLE
AU  - Poková, Michaela
AU  - Cieslar, Miroslav
AU  - Lacaze, Jacques
TI  - TEM Investigation of Precipitation in Al-Mn Alloys with Addition of Zr
DP  - 2012 Dec 1
TA  - Manufacturing Technology Journal
PG  - 212--217
VI  - 12
IP  - 2
AID - 10.21062/ujep/x.2012/a/1213-2489/MT/12/2/212
IS  - 12132489
AB  - Aluminium and its alloys belong to the most widely used metallic materials for industrial applications. One of the possible casting methods is twin-roll casting which produces sheets with high solid solution supersaturation. Decomposition of this supersaturated material during heat treatment was studied in aluminium alloys from the AW-3003 series - one standard grade and the other modified by addition of zirconium. Characterization by differential thermal analysis and observations by electron microscopy revealed that precipitation of α-AlMnFeSi phase occurred in two steps around 360 and 450 °C in twin-roll cast sheets, firstly on subgrain boundaries and afterwards also within the grains. In cold-rolled sheets, precipitates formed directly within the grains. The zirconium addition shifts recrystallization to higher annealing temperatures in the cold-rolled Zr-containing alloy.