This paper presents experimental results on intermittent electromagnetic radiation during plastic deformation of Cu -Nialloys under tension and compression modes of deformation. On the basis of the nature of electromagnetic radiation signals, oscillatory or exponential, results show that the compression increases the viscous coefficient of Cu -Ni alloys duringp lastic deformation. Increasingt he percentage of solute atoms in Cu -Nialloys makes electromagnetic radiation strength higher under tension. The electromagnetic radiation emission occurs at smaller strains under compression showing early onset of plasticd eformation. This is attributed to the role of high corer egion tensile residual stresses in the rolled Cu -Nialloy specimensinaccordancew itht he Bauschinger effect. The distance between the apexes of the dead metalcones duringcompression playsas ignificant role in electromagnetic radiation parameters. The dissociation of edge dislocations into partials and increase in internal stresseswith increase in solute percentage in Cu -Nia lloys under compression considerably influences the electromagnetic radiation frequency.R. Singh et al.: Correlation of deformation induced electromagnetic radiation with mechanical properties of Cu -Nialloys Int.