Experimental Study of Friction and Wear Behaviour of Ni Based Superalloy Material

Abstract

Nickel based superalloy material is used for the design of dampers in steam and gas turbine. Parametric study of rubbing velocity, contact pressure and contact temperature influence on Nickel based superalloy material coefficient of friction and wear analysis. Friction is not desirable in machines, but it is desirable in design parameter for brakes and clutches. In the present paper, an experimental investigation is carried to find out the coefficient of friction and wear rate of Nickel based superalloy material. Experiments are carried by using a pin on disk apparatus on different diameter pins and disks of the same material. The experiments are carried on normal load ranging from 10 to 200N, speed varies from 200 to 2000 rpm and, wear track diameter ranging from 5 to 160 mm. Thus, the coefficient of friction and wear rate were studied with varying normal load at a constant rubbing velocity for different diameter pins. Thereafter the coefficient of friction and wear rate studied at a constant normal load with varying rubbing velocities for different diameter pins. By varying normal load at constant rubbing velocity it is observed that coefficient of friction decreases and wear rate increases for all diameter pins