In order to explain creep behaviour of beta'-brass, i.e., long-range-ordere
d stoichiometric Cu50Zn brass: creep experiments at constant structure base
d on an analysis of the strain response on sudden applied stress change wer
e applied in the steady-state region of creep of the alloy. An original int
erpretation of the experimental results allows to evaluate characteristics
of kinetics of dislocation slip and yields further possibilities to identif
y slip mechanisms. From the application of the experiments and interpretati
on of their results in beta'-brass, conclusions can be drawn that creep is
controlled by diffusion along the high diffusivity paths, probably along su
perdislocations. The activation area of the slip strongly depends on the ap
plied stress and temperature. The temperature dependence of the activation
area at a given effective stress is negligible, if it exists at all. The de
nsity of mobile dislocations depends strongly on the applied stress.