WEAR CHARACTERISTICS OF PURE ALUMINIUM, AL-ALLOY & AL-ALUMINA METAL MTRIX NANO COMPOSITE IN DRY CONDITION: PART-IV

Vyjainto Kumar Ray, Payodhar Padhi, B. B. Jha, Tapas Kumar Sahoo

Abstract: In this report, the aluminium metal matrix was reinforced with 1.5 wt. % of alumina nano particles using non-contact cavitation method to prepare the metal matrix nano composite. Microstructural investigation was conducted on the worn out samples. It showed uniform distribution of alumina particles in the matrix. Sliding wear behavior of the as-cast MMNC was studied in dry condition, under different test conditions by varying the load (constant and step loads) and the sliding speed (constant and step speeds) using a Multiple Tribo Tester. It was found that resistance to sliding wear improved considerably with the addition of alumina nano particles. FESEM images of the worn out surfaces of pure Al, Al-alloy (duralumin) and MMNC reveal that the MMNC has greater resistance to sliding wear compared to pure aluminium and duralumin. Wear rate increases with increase in load and sliding velocity. Wear rate is more when load and speed are increased in steps. Delamination and abrasion are the dominating types of wear observed.

Keywords: Wear rate, Al2O3, MMNC, Duralumin. Coefficient of friction

DOI: https://doi.org/10.15623/ijret.2015.0408016