Abstract
Abstract Stress-strain data were obtained over a wide range of grain sizes for brass, copper and aluminium. A Hall-Petch relation was found not to describe work hardening in the cases of copper and aluminium. An approach to poly-crystal work hardening, based in part on Ashby's concepts, was also unsuccessful in describing the behaviour of the same materials. These results indicate the need for a new viewpoint on the influence of grain size on poly-crystal work hardening.
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