Abstract
Stress relaxation measurements at 773 and 823 K in bending and for different initial stresses in type AISI 304 stainless steel are reported. Several thermal treatments were given to the specimens prior to the relaxation testing. The data are fitted to a general equation that describes thermally activated dislocation motion and it is shown that, in some cases, the internal stress changes with the applied stress. No substantial differences were found in the stress relaxation behaviour on changing the thermal treatment. This is attributed to the influence of dynamic strain ageing; an equation which can be used to describe experimental log stress against log strain rate curves is presented.
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