Influence of secondary structures formation on tribological properties of aluminum alloys- steel friction pairs

Abstract

the present paper describes the elemental composition of secondary structures formed on the contact surface during wear test of experimental high-alloyed Al alloys against 38CrNi3Mo steel. The composition of experimental aluminum alloys have Sn content between 5.4-11% and, additionally, these alloys have a Pb, Cu, Si, Mg, and Zn in its chemical composition. Tribological tests were carried out according to the rotating steel roller-fixed shoe of antifriction alloy scheme under boundary lubrication conditions. The surface and subsurface layer of experimental aluminum alloys and steel were studied by scanning electron microscopy including energy-dispersive analysis. The simultaneous presence of various constituents of oil, steel and Al alloys can produce both positive and negative effects on friction characteristic of tribopair. The aim of this work to show elemental composition on steel and aluminium alloys surfaces and their influence on the intensity of wear. The interaction behavior of some of the chemical elements in the friction pair was shown and discussed.