Influence of multi-pass FSP on the microstructure, mechanical properties and tribological characterization of Al/B4C composite fabricated by accumulative roll bonding (ARB)

Effects of Al2O3 nanoparticles volume fractions on microstructural and mechanical characteristics of friction stir welded nanocomposites

“…This was due to the vigorous stir action induced by the FSW tool, as a result, an adequate amount of heat and mechanical force was generated which is sufficient for the uniform dispersal of RPs in the wide area of nugget zone [21,26,27]. These findings are in better agreement with the studies conducted by Keneshloo et al [28] and Paidar et al [29] according to which the area/ volume fraction as well the size of the reinforcement particles are inversely proportional to each other.…”

Role of Mg2Si particles on mechanical, wear, and corrosion behaviors of friction stir welding of AA6061-T6 and Al-Mg2Si composite

“…Adhesive worn surfaces typically have pits or grooves formed as a result of weak resistance to dislocation motion. 38 The TC tool restrained adequate fragmentation and dispersion of Mg 2 Si particles within the nugget area of the AA6061/Al-Mg 2 Si joint. Thus, the regions with insufficient Mg 2 Si were prone to pitting and wear erosion during wear.…”

“…The increase in mass loss (against sliding distance) is attributed to the effect of prolonged surface-surface contact on the 6061-T6/Al-Mg 2 Si sample. 38 The assessment of the three 6061-T6/ Al-Mg 2 Si samples (TT, TTC, and TC) shows that the TT sample has the minimum wear-induced mass loss and wear rate due to the much fine average (hard) Mg 2 Si phase in the sample. The sufficient fragmentation of the Mg 2 Si phase in the 6061-T6/Al-Mg 2 Si joint (see Table 3) implies the presence of increased grain boundaries and large surface area/dispersion for the hard Mg 2 Si phase.…”

“…Dynamic recrystallization can thus be considered as the most important mechanism responsible for this phenomenon. Paidar et al 38 reported that fragmentation of particles increased the number of grain boundaries in a composite and this attribute imposed a pinning effect on grain coarsening/growth. This phenomenon may be responsible for the reduced average grain sizes in the joint fabricated with the TT tool.…”

Microstructural, mechanical and wear characteristics of aluminum matrix composites fabricated by friction stir processing

“…Therefore, grains are further refined with every pass. The successive grain refinement was observed by Paidar et al [93] as they measured reduction in grain size from 22 µm of base aluminum to 19.21 µm of B 4 C reinforced composite after single pass, which further reduced to around 3.25 µm after 8th pass. They also observed reduction in interparticle distance at higher number of passes which indicated enhancement of uniformity of particle distribution with increasing passes.…”