Correlation of plastic deformation induced intermittent electromagnetic radiation characteristics with mechanical properties of Cu–Ni alloys

Abstract

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.

Influence of an Engineered Notch on the Electromagnetic Radiation Performance of NiTi Shape Memory Alloy

“…A smooth correlation was observed between the EMR emission, grain size, and lattice constant [16,17]. Experiments using intermittent EMR in the plastic deformation of Cu-Ni alloys during tension and compression revealed that the compression viscosity coefficient increases during plastic deformation [18]. The plastic zone radius was correlated with the notch-depth ratio in tensile tests conducted on the Cu-Ni alloy [19].…”

“…Figure 3 shows the stress-strain plot depicting the stages of intermittent EMR emission for 2a/w = 0.33. The EMR signal for various metallic materials [13][14][15][16][17][18][19] exhibits exponential decaying and damped oscillating characteristics. Figure 4a shows the first EMR emission signal near yielding for 2a/w = 0.33, indicating an oscillating damping nature.…”

Evaluation of metal plastic deformation using radio‐frequency reflection features

“…Oskooie et al [14] studied the plastic deformation and strengthening mechanisms of an Al–Mg–Si alloy with a bimodal grain structure using optical microscope, transmission electron microscope and field emission scanning electron microscope equipped with an electron backscattered diffraction detector. Singh et al [15] presented experimental results on intermittent electromagnetic radiation during plastic deformation of Cu–Ni alloys under tension and compression modes of deformation. Rahman et al [16] studied the deformation behaviour of a twinning induced plasticity steel at quasi‐static strain rates using synchrotron X‐ray diffraction.…”