Influence of Mn on mechanical properties and microstructure of mould-cast Al-Sc-Zr-based alloy

Abstract

Specimens of two mould-cast aluminium Al-Mn-Sc-Zr alloys with various Mn and Zr content were isochronally annealed in the temperature range of 20 °C – 570 °C. Precipitation reaction was followed with electrical resistivity and microhardness (HV0.3) measurements.

The Mn-addition very probably does not influence the solid solution decomposition of ternary Al–Sc–Zr system during isochronal annealing.

Keywords

• Al–Mn–Sc–Zr-based alloy
• electrical resistivity
• isochronal annealing
• Al3(Sc
• Zr) phase
• TEM.