Tribological properties improvement of conventionally-cast Al-8.5Fe-1.3V-1.7Si alloy by multi-pass friction stir processing

Multipass Friction Stir Processing of Laser-Powder Bed Fusion AlSi10Mg: Microstructure and Mechanical Properties

“…In the SZ of the S2 and S3 FSPed samples, larger Si particles were formed ( Figure 4 c,d), indicating Si growth and coarsening. The activation energy for the growth and coarsening of Si particles is the high number of solute Si atoms trapped in the Al matrix because of the high cooling rate during the non-equilibrium solidification of L-PBF AlSi10Mg [ 15 ]. During the FSP, the temperature induced by the rotational tool caused the precipitation of supersaturated Si particles.…”

“…The KAM value of the center point is the average of these misorientations, which indicates the amount of stress concentration [ 26 , 27 ]. The more uniform distribution and lower KAM values indicate less-concentrated stresses in the samples, which causes delayed necking and higher ductility [ 15 ]. The KAM maps of the SZs in different samples are illustrated in Figure 17 , which shows the existence of the initial concentrated stress in all samples.…”

“…The number of passes plays a key role in determining the final properties of FSPed metals and alloys because of their direct effect on microstructural evolution, which has been investigated by several studies on different types of material, including aluminum-based cast alloys [ 15 ]. For example, Nakata et al [ 16 ] studied the effect of multipass FSP on the microstructural and mechanical properties of a die-cast aluminum alloy.…”

Animal waste powder utilization for Al6061/SiC composite using friction stir processing with scroll shoulder hexagonal tool

“…The design of the outer surface of the shoulder is likely to influence processing quality since the shoulder plunge depth is generally small. [22][23][24] According to the authors, stirring the ingredients required a probe-free shoulder tool with a bottom-scrolling shoulder surface. It has the potential to be utilized for sound processing and welding.…”

“…The wear rate and coefficient of friction are improved by 97% and 52%, respectively. 23 Ji et al explored the effect of several rotational speeds such as 1800, 2100, 2400, and 3000 rpm on cold sprayed Al coatings on Ti substrates. At 2400 rpm, a dense coating is obtained and equiaxed grain with low density is found in the stir zone and achieved a maximum microhardness of 37.3 Hv in SZ.…”