Investigation of mechanical properties of Cu/SiC composite fabricated by FSP: Effect of SiC particles’ size and volume fraction

Effect of Welding Speed on Microstructure and Mechanical Properties due to The Deposition of Reinforcements on Friction Stir Welded Dissimilar Aluminium Alloys

“…The addition of reinforcements in to the metal matrix creates more number of misoriented low angle grain boundaries during the plastic deformation, which results more nucleating sites in the stir zone. Thus the low angle grain boundaries are transformed in to high angle grain boundaries and new grains are nucleated at favourable sites, which yielded fine grain microstructure [4]. The stir zone microstructure with carbon nanotubes at a traverse speed of 70mm/min and 80mm/min are shown in Fig.…”

“…The factors which influence the mechanical properties are grain size, the interaction between the reinforcements and base metals and dislocation density [4]. The generation of dislocation density was higher at the interface due to large thermal mismatch between the carbon nanotubes and aluminium matrix, which enhances the strengthening of the matrix by work hardening [22].…”

“…In recent years the concept of FSW was utilized to produce the surface composites by depositing different types of reinforcements (macro, micro and nano) during friction stir processing [4,5]. The impact of particle distribution during number of pass was investigated by various researchers.…”

Wear characteristics of copper-based surface-level microcomposites and nanocomposites prepared by friction stir processing

“…8(c) is a sign of the superior wear resistance of Cu/SiCp nanocomposite layer. The excellent wear resistance of the nanocomposite is mainly attributed to the following reasons: (a) the higher number of nanosized SiCps than microsized SiCps (although the volume percentage was the same for both microcomposites and nanocomposites) [10], (b) good bonding of nanosized SiCps with the Cu matrix [20], (c) the higher microhardness value (189 HV) due to nanosized SiCps, and (d) SiCps sustaining wearing loads and impeding direct load contact of the Cu matrix and the disc [22].…”

“…It was found that on the addition of SiCps, wear resistance and friction coefficients were improved. Barmouz et al [10] also developed Cu/SiCp surface composites via FSP with microsized and nanosized SiCps using the groove method for SiCp deposition. The size of SiCps considerably influenced the grain size and wear rate of the Cu/SiCp surface composite.…”