Products made from al/zn/mg/cu alloys with improved...

Details Products made from al/zn/mg/cu alloys with improved... Products made from al/zn/mg/cu alloys with improved...

C - Chemistry, Metallurgy

22

C

C22C 21/10 (2006.01) C22F 1/053 (2006.01)

Patent

CA 2528614

The invention relates to a drawn, laminated or forged aluminium alloy product, characterised in comprising (in mass %): Zn 6.7 7.5 %, Cu 2.0 2.8 %, Mg 1.6 2.2 one or several elements selected from the group Zr 0.08 0.20 % ,Cr 0.05 0.25 %, Sc 0.01 0.50%, Hf 0.05 0.20 %, V 0.02 0.20%, Fe +Si < 0.20%, other elements = 0.05 % each and = 0.15 % in total, the residue being aluminium. Said product has an improved compromise between static mechanical resistance and tolerance to damage.

L'invention concerne un produit filé, laminé ou forgé en alliage d'aluminium, caractérisé en ce qu'il comprend (en % massiques) : Zn 6,7 - 7,5 %, Cu 2,0 - 2,8 %, Mg 1,6 - 2,2 un ou plusieurs éléments choisis dans le groupe constitué de Zr 0,08 - 0,20 % ,Cr 0,05 - 0,25 %, Sc 0,01 - 0,50%, Hf 0,05 - 0,20 %, V 0,02 - 0,20, Fe +Si < 0,20% autres éléments <= 0,05 % chacun et <= 0,15 % au total, le reste aluminium. Ce produit présente un compromis amélioré entre résistance mécanique statique et tolérance aux dommages.

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