Influence of Cantor Alloy Particles on Microstructure, and Wear Behavior of Aluminum Metal Matrix Composite

The performance of industrial tribo-systems depends on advanced composites with superior tribological characteristics. In this study, the CoCrFeMnNi high entropy alloy (HEA) is prepared through mechanical alloying, while stir squeeze casting aided with an ultrasonic transducer is used to fabricate AA 6082 alloy and x% HEA/AA composites (where, x= 2, 4, 6, 8 in weight percentage). The effect of HEA(p) on dry sliding wear performance of HEA/AA composites is examined in as-cast conditions using a pin-on-disk wear tester at varying normal applied pressure (0.254 MPa, 0.509 MPa, 0.763 MPa, 1.018 MPa, and 1.273 MPa), varying sliding distance (1000 m, 2000 m, 3000 m, 4000 m, and 5000 m) and a constant sliding speed (3.5 m/sec), special emphasis is centered on response factors such as wear rate, seizure resistance, and bulk temperature upsurge. The composite showed an ability to withstand higher temperatures, and better seizure and wear resistance over the alloy. The phase identification and microstructural study were carried out using an X-ray diffractometer, field emission scanning electron microscope, and transmission electron microscope, whereas the topography of worn-out surface was examined through an optical profilometer. There was a substantial decrease in coefficient of friction, and wear rate noticed as the HEAs concentration increased, whereas in all the wear conditions, the wear rate of 8% HEA/AA composite shows maximum resilience against wear, the inclusion of HEA particles also influences the extent of the subsurface at the seizure condition. [GRAPHICS] .