PHYSICAL MEASUREMENTS ON COPPER-MANGANESE ALLOYS .3. INFLUENCE OF THE QUENCHING TEMPERATURE ON THE ELECTRICAL-RESISTANCE AND ON THE DILATATION OF THE ALLOYS

On the annealing of quenched copper alloys up to 30 at.% manganese, complex mixed states are occuring whose temperature and concentration dependences are determined by measurements of length variations and of the electrical resistivity. An annealing diagram of the alloys quenched from 625-degrees-C has been established. The phase diagram of the equilibrium states has been completed. Under equilibrium conditions, at 17 at.% manganese, two modifications of Cu5Mn occur, one at high temperatures and one at room temperature.