Stress relieving of an age hardenable aluminium alloy product

摘要

Stress relieving of an age hardenable aluminium alloy product after solution heat treatment and quenching, is carried out by a permanent cold plastic deformation applied by the steps of:- (a) applying a stress-relieving cold mechanical stretch to said product, and (b) applying a stress-relieving cold compression to said product. This combined treatment gives improved strength and toughness and at least comparable distortion after machining.