Wear assessment of Al/Al2O3 nano-composite surface layer produced using friction stir processing

Production of in-situ hard Ti/TiN composite surface layers on CP-Ti using reactive friction stir processing under nitrogen environment

“…Thus, a fine microstructure is achieved due to the occurrence of dynamic recrystallization phenomena [6,7]. Formation of various composite and nano-composite surface layers were reported on Al [8][9][10], Mg [11][12][13][14][15][16], Cu [17] and Ti [18,19] substrates by introduction of hard ceramic particles such as SiC [11,[16][17][18][19], Al 2 O 3 [9,20], B 4 C [10], C60 [13], multi-walled carbon nano-tubes [12] and SiO 2 [14] into the stir zone; particles were mainly preplaced in a groove in front of the tool. Further works showed significant increases in microhardness and wear resistance of the fabricated composite surface layers compared to those of their underlying substrates [19,20]; these were related to uniform dispersion of hard ceramic particles and fine matrix grain size.…”

Tribological Property of Surface Hybrid Composite Layer Fabricated on Aluminum Alloy 7075 by FSP

“…However, the distribution of reinforcement particles was uniform at the top of nugget zone. As compared to that, there existed some aggregation of reinforcement particles and voids at the bottom of nugget zone, which may be attributed to the inadequate plastic flow by one FSP pass [10]. This phenomenon was neglected because the tribological behavior of the hybrid SMMCs was measured.…”

Fabrication and wear characterization of an A413/Ni surface metal matrix composite fabricated via friction stir processing

“…Raaft et al [32] have reported that depending on the type of the reinforcement particles, selection different rotation and traverse speed can have different effects on avoiding agglomeration. In another attempt, Shafiei-Zarghani et al [33] have concluded that the increase in the number of passes can cause the more uniform and finer dispersion of reinforcement particles. Therefore, the agglomeration of reinforcement particle can be reduced.…”