FRICTIONAL BEHAVIOUR OF SURFACES COMPOSED OF MULTI-LAYERS

Document Type : Original Article

Authors

1 Prof.,Mech.Design & Prod.Dept.,Cairo University, Egypt.

2 Colonel Dr.Eng.,Machine Design Dept.Military Technical College, Egypt.

3 Colonel, Military Engineering Dept., Egypt.

Abstract

This work presents an experimental investigation into the fri-ctional behaviour of surfaces composed of multi-layers. The effect of using single or multi-metalic layers adhered to a hard or soft substrate on frictional behaviour has been fully analyzed under dry orlubricated situations. Asteel substrate covered by copper layer, or electrically coated by chromium, nickel, or copper, and brass substrate covered by aluminium layers were used. The coefficient of friction couldbe recorded under a sliding speed ranging from 0.26 m/s to 2,54 m/s and a load ranged up to 540 N. It could be concluded that the existance of layers affect the frictional behaviour in a manner dependent on layer material, layer thickness, the applied load and operating speed.