Abstract
The subgrain structure of hot worked aluminium was found to remain geometrically self similar for various deformation conditions, undergoing only alteration in size as the flow stress changes. The stress and temperature related alterations of the subgrain size distributions have been described mathematically by the two parameters of the lognormal probability function which fits the experimental data. It has been found that the rate of scaling of the structure changes in stage IV work hardening. Experimental observations and statistical considerations suggest that the lognormal character of the subgrain size distribution arises as a result of a multiplicative interaction of recovery processes.
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