Abstract
Discontinuous precipitation (DP) is associated with grain boundary migration in the wake of which alternate plates of the precipitate and the depleted matrix form. Some copper base alloys show DP while others do not. In this paper the misfit strain parameter, η, has been calculated and predicted that if 100 η > ± 0·1, DP is observed. This criterion points to diffusional coherency strain theory to be the operative mechanism for DP.
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