Sammendrag
Tensile tests have been carried out on a commercial Al – Mg – Si-alloy after simultaneous deformation and artificial ageing. Extruded and solution heat treated specimens were deformed 2 %, 5 % and 10 % (engineering strain) and simultaneously artificially aged at two different temperatures (175 and 190 °C) for various times (depending on the strain rates used for pre-deformation) before tensile testing. A comparison with previously obtained tensile properties following sequential pre-deformation and artificial ageing shows that the simultaneous mode generally displays better mechanical strength and after shorter ageing times. The best performing alloy has been obtained by using a split artificial ageing procedure for 10 % deformed sample simultaneously aged for 40 min at 175 °C followed by additional ageing for 60 min at the same temperature.