PT Journal
AU Pokova, M
   Cieslar, M
   Lacaze, J
TI TEM Investigation of Precipitation in Al-Mn Alloys with Addition of Zr
SO Manufacturing Technology Journal
PY 2012
BP 212
EP 217
VL 12
IS 2
DI 10.21062/ujep/x.2012/a/1213-2489/MT/12/2/212
DE Aluminium alloys; AW-3003; TEM; precipitation; α-AlMnFeSi
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.
ER