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Magnesium-based alloys are gaining a lot of attention due to their high strength-to-weight ratio, good machinability, and high damping capacity. They are being utilized in various fields including aerospace, automotive, and electronics. Friction Stir Processing (FSP) is a solid-state surface modification technique derived from the principle of friction stir welding. Similar to FSW, it consists of a rotating tool having shoulder and pin arrangement which when plunged into the workpiece causes heavy plastic deformation and heat generation. Further, it leads to dynamic recrystallization during the process resulting in a densified, homogenized and refined microstructure. FSP is a promising strategy for surface modification of lightweight alloys. This methodology can be employed for obtaining magnesium-based surface composites by introducing different reinforcement particles viz. SiC, Al2O3, B4C, and SiO2 into the base metal to improve hardness, strength, wear, and corrosion resistance. This review offers a better understanding of various mechanical and metallurgical properties along with microstructural analysis of FSPed Magnesium alloys.
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