Microstructural Evaluation, Tribological Behavior and Mechanical Properties of Cu–Ni Alloy After Addition of Chromium Under Spinodal Conditions

Abstract

The aim behind this present investigation is to study of phase decomposition during aging of Cu–Ni alloy in presence of Cr within spinodal conditions and influence of Chromium on hardness and tribological behavior. Heat treatment of Cu-28.9%Ni-2.8%Cr was carried out and specimen was observed under Optical and transmission electron microscope and wavelengths in the specimens was computed. Isothermal aging of this alloy helps to mechanism, morphology and kinetics of phase decomposition. After the heat treatment specimen were tested for hardness, wear rate and the coefficient of friction. It was observed that with the increase in Cr content hardness also increased so the decrease in wear rate with great extent; also, It was observed that the growth kinetics of phase decomposition is proportional to the aging time and aging of the spinodal alloy improves the coherency and nanometre size and it is associated with the increase in strengthening of Cu–Ni–Cr alloy.