Abstract
A unified theoretical model for work-hardening of polycrystalline metals has been developed by considering the effect of dislocation structure formation on dislocation storage and dynamic recovery rates during deformation. The model consists of two structural parameters: a factor of mean dislocation number associated with a dislocation-band-site at the steady state of deformation, in addition to another more conventional parameter, the mean dislocation density or flow stress. The model can be applied to a wide range of deformation conditions and the two well known work-hardening laws, i.e. the Kocks model suitable for low temperature deformation and Roberts model has been validated by using reported derived directly from the unified model as special cases. The model has been validated by using reported experimental data for high purity aluminum. Good agreement has been obtained between the theory and the measurements.
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