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Wear behavior of friction stir welded AA6061-SiC composites and AA6061-4.5%Cu- SiC hybrid composites plates

Venkatesh B. N, M. S. Bhagyashekar


This paper presents experimental investigations on tribological properties of AA6061 composites & AA6061-4.5%Cu hybrid composites containing silicon carbide (0 to 9%) in step of 3, before and after FSW. The wear, wear rate, co-efficient of friction and wear resistance depends on sliding distance and contact load. The AA6061-SiC composites and AA6061-4.5%Cu-SiC hybrid composites were produced by stir casting method, the castings were machined to obtain composite plates of 100mm×50mm×6mm. The composite plates are friction stir welded at tool rotation speed 650rpm, axial load 6KN by using square profile tool pin with a constant welding speed 45mm/min. The wear tests were conducted using a pin on disc wear tester, the result shows that the wear and wear rate of all composites tested before and after FSW decreases with an increase in percentage of SiC particle in composite, wear and wear rate of AA6061-4.5%Cu-9% SiC hybrid composite is lower compared to the cast AA6061 and AA6061-9%SiC composite, The wear resistance of the AA6061-4.5%Cu- 9%SiC hybrid composite is 4.5 times higher than cast AA6061 after FSW, Co-efficient of friction of AA6061- 4.5%Cu-9% SiC hybrid composite lower compare with cast AA6061, AA6061-9%SiC composite


Friction Stir Welding (FSW); Wear; Wear rate; Co-efficient of Friction

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