Abstract
A study has been made of how the individual operations carried out during the thermomechanical treatment of a Cu–Cr alloy affects the alloy's electrical properties. Cold working was found to increase the electrical resistivity, decrease the temperature coefficient of resistivity, and accelerate the decomposition of the supersaturated solid solution. The magnitude of these changes depends on the degree of cold work and on the state of the alloy. An analysis of the changes in electrical resistivity suggests that cold work causes a partial or complete ‘disintegration’ of the submicroscopic precipitates of Cr nucleated during solution heat treatment and increases the so–called effective Cr concentration.
MST/226
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