Machinability studies on Al 7075/BN/Al2O3 squeeze cast hybrid nanocomposite under different machining environments

Enforcement of stricter environmental policies demands alternative methods that could reduce the usage of cutting fluid during machining. Thus, dry machining and minimum quantity lubrication (MQL) machining are gaining practical importance. Due to enhanced mechanical and thermal properties, aluminium based nanocomposites have wide application in aerospace and automobile industries. In this work, asqueeze cast hybrid nanocomposite is developed with the reinforcement of 0.5wt% hexagonal boron nitride and 1wt% alumina particles in the base matrix of Al 7075 that is subjected to a squeezing pressure of 150MPa. During the turning of this hybrid nanocomposite, thefeed rate is varied (0.1, 0.2, and 0.3mm/rev)and its influence on the generated forces, tool wear and surface roughness under dry and MQL environments is performed. The results are compared with squeeze cast unreinforced aluminium alloy and presented.