Stress relieving of a workpiece from age-hardenable aluminum - alloy

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:P P(a) applying a stress-relieving cold mechanical stretch to said product, andPP(b) applying a stress-relieving cold compression to said product.PPThis combined treatment gives improved strength and toughness and at least comparable distortion after machining.