Mechanical properties enhancement of Mg–4Si in-situ composites by friction stir processing

Abstract

The effect of friction stir processing (FSP) on the microstructure and mechanical properties of Mg–4Si composite was investigated. FSP was performed under the traverse speeds of 8, 12.5, and 16 mm min−1 at different rotation speeds of 800, 1250, and 1600 rev min−1. FSP greatly improved the mechanical properties of the composite. The optimum mechanical properties were obtained at the traverse and rotation speeds of 12.5 mm min−1 and 1250 rev min−1, respectively. The tensile strength, fracture strain, and microhardness of the composite were improved by about 140, 512, and 20%, respectively. The effective refinement and even distribution of Mg2Si particles, formation of ultrafine dynamically recrystallized grains, and the elimination of casting defects were the most influential factors affecting the properties of the alloy.

Surface Modification and Parametric Optimization of Tensile Strength of Al6082/SiC/Waste Material Surface Composite Produced by Friction Stir Processing

“…They also concluded that with increased wt.% of reinforcement particles of B 4 C with scroll shoulder there is increased hardness. Taghiabadi and Moharami [16] optimized the effect of process parameters i.e., traverse speed and tool rotational speed on Mg 4 Si using FSP. Results revealed that the optimized value of the traverse speed is 12.5 mm/min and the rotation speed is achieved at 1250 rpm.…”