METHOD FOR PRODUCING AN ALUMINUM ALLOY PART IMPLEMENTING AN ADDITIVE MANUFACTURING TECHNIQUE WITH PREHEATING

A method for manufacturing a part (20) including forming successive metal layers (201 . . . 20n), stacked on each other, each layer being formed by depositing an aluminum alloy (15), the aluminum alloy being subjected to an energy input so as to melt down and form said layer when solidifying, the method being characterized in that:during the manufacture of the part, before the formation of each layer, the aluminum alloy powder is maintained at a temperature higher than or equal to 25° C. and lower than 160° C. or comprised from 300° C. to 500° C.;the method includes applying, to the part, a post-manufacture heat treatment at a temperature comprised from 300° C. to 400° C.;the post-manufacture heat treatment begins with an increase in temperature, the increase being performed at a temperature rise rate higher than 5° C. per minute;the method does not include solution heat treatment followed by quenching.