Tribological Behavior of CW614 Brass Coated with Ni-Cr Layers Sliding Against 52100 Steel

Dry sliding wear tests were performed on a CW614 brass alloy coated with Ni-Cr layers using a pin-on-disk configuration. In order to characterize the surface durability and wear process of Ni-Cr electrodeposition, a parametric study was conducted to provide data on the friction coefficient, wear, and contact surface temperature within a load range of 10-25 N and sliding velocity ranging from 0.78 to 2.35 m/s. Two main wear modes have been observed: (i) micro-transfer phenomenon associated with delamination wear for mild loading conditions, and (ii) macro-transfer along with intensive plastic deformations and oxidative wear for severe loading conditions. The mild-to-severe wear mechanism transitions have been summarized in a wear-friction map.