This study was undertaken with the aim of modifying the microstructure and improving the tribological properties of in situ Al-20Mg2Si composite. For this purpose, friction stir processing (FSP) was applied on the composite at constant travel and rotation speeds of 110 mm/min and 1500 rpm, respectively, using three different tool pin profiles: threaded tapered cylindrical, triangular tapered, and triangular threaded tapered. The sliding wear tests were conducted using a pin-on-disc apparatus under the applied load of 30 N and sliding distance of 1000 m at room temperature. The results showed that FSP substantially improved tribological properties of the as-cast composite. The best result was observed in the sample processed by the threaded triangular tapered tool, where compared with the as-cast composite, its wear rate and average friction coefficient decreased by almost 40% and 18%, respectively. This improvement can be attributed to the significant refinement and uniform redistribution of Mg2Si intermetallics, especially the coarse irregular-shaped primary crystals, the formation of ultrafine grains, and elimination of casting defects from the substrate microstructure of the processed sample, which improves its hardness and increased its potential in supporting the oxide tribolayer on the composite surface.
https://doi.org/10.1115/1.4044672
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)