Effects of milling time on sintering properties and formation of interface Al4C3 on graphite reinforced Al-4.5Cu-1.5Mg nanocomposite

Aluminum-based metal matrix nanocomposites have been extensively researched and developed for aerospace automotive applications. Al-4.5Cu-1.5Mg with 0.5 wt% graphite were milled 2 h, 4 6 8 h using shaker mill under argon gas. The phenomena of deformation, fracturing, cold welding during investigated to observe how the effects on their morphology formation intermetallic phases due its very high speed. Sintering ultra-high purity gas 99.9999% was done produce density materials. Intermetallic phase Al4C3 found as a result reaction between aluminum milling. Formation is important alloy an interface reinforcement particle in order higher hardness. A decrease Peaks Cu followed by increase Al2Cu precipitation XRD pattern occurred increasing milling time. role improving mechanical properties, resulting highest hardness value reaching 97 HV 83% at