Abstract

In this study, the friction stir processing (FSP) was employed to modify 1060 Aluminum (Al) surface composites reinforced with lead (pb) particles of different mass fractions (0–30 wt%). The effect of the Pb content on the microstructure, mechanical properties and wear resistance of Al-Pb alloy layer was investigated. The results indicated that an excellent metallurgical bonding was formed between Pb-rich phase and Al matrix by FSP, and most lead particles were uniformly distributed in the low regions of Al-Pb alloy layer. The tensile strength of FSPed composites was inferior to that of pure Al, while the elongation of FSPed composites with Pb content of 0-18 wt% was obviously enhanced. The wear resistance of FSPed composite was increased firstly and then decreased with increasing Pb content. Amongst the FSPed Al-Pb composite, specimen with 18 wt% of Pb showed the optimal wear resistance with low coefficient of friction.

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