Structure and wear of Al surface layers reinforced with AlCuFe particles using ultrasonic impact peening: Effect of different particle sizes

► AlCuFe particles reinforced composite layers in Al. ► Ultrasonic impact peening enables uniform dispersion of reinforcements in the Al matrix. ► Sufficiently strong interfacial bonding promotes increase in wear resistance. ► Formed sub-structure or nano-sized grain structure enhances wear and microhardness. ► Double growth in wear resistance of reinforced surface layers is observed.