Wear behavior of AA1060 reinforced with alumina under different loads

M.R. ROSENBERGER , E. FORLERER , C.E. SCHVEZOV

WEAR

Elsevier Science B.V.

Lugar: Amsterdan, Netherland; Año: 2009 vol. 266 p. 356 - 359

0043-1648

The wear behavior of samples of AA1060 aluminum matrix reinforced with 15vol% of aluminaparticles in a range of loads between 4.9 N and 91.2 N was determined using a pin-on-ring machine at avelocity of 2.7 m/s. The counterface was a carbon steel ring of 272 HB in hardness. Optical and electronicmicroscopy, X-Ray energy analysis and hardness measurement were performed in order to characterize theworn samples. A mild wear mechanism is present for loads lower than 80 N and at larger loads themechanisms change to a severe mode. In the mild wear regime a Mechanically Mixed Layer (MML), withiron from the counterface and material of the composite, was formed. This MML was responsible of the wearresistance of the composite. Two mechanisms were observed as a way to increase the resistance of theMML; first hardening by mechanical alloying and strain hardening, and then an increase in thickness. At alarger load the conditions produced large instabilities which prevented the formation of a protectiveMechanically Mixed Layer.