Effects of nanometric inclusions on the microstructural characteristics and strengthening of a friction-stir processed aluminum–magnesium alloy

Influence of CNTs decomposition during reactive friction‐stir processing of an Al–Mg alloy on the correlation between microstructural characteristics and microtextural components

“…Owing to grain refinement after FSP without powder, all tensile properties were improved simultaneously up to ∼3%, 15% and 13%, respectively. For the nanocomposite sample, improvements in the tensile strengths were more significant by contributing the described dynamic restoration mechanisms, microstructural characteristics and microtextural components (Khodabakhshi et al ., , ). For instance, the YS increased by nearly two times, although, some loss in ductility occurred with strains of ∼19.3%.…”

“…The ideal shear texture about the FCC metals like aluminium matrix is the (Fonda & Knipling, ). Although, introducing some reinforcing agents can affect it as well, by controlling the PSN and Zener pinning mechanisms (Khodabakhshi et al ., , ). The presence of nanosized inclusions within the aluminium matrix with an ‘onion ring’ pattern can leads to the periodic variations of crystallographic texture across the stirred region (Khodabakhshi et al ., , ).…”

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

“…High hardness, high compressive strength, wear resistance, fracture toughness, uniform density, elevated temperature stability are some important aspects considered while selecting tool material. Tools made of some hot works steel such as SKD61 [29] and H13 [31][32][33][34] and other alloy steels such as MP159 [15], hardened HCHCr steel [35][36][37] and heattreated WC-Co (12%) [38] have been used for friction stirring of aluminum alloys to fabricate AMCs. Another important aspect while selecting tool material during composite fabrication is the wear out of tool by the hard reinforcement material.…”

“…DDRX can also take place in high γ SFE material during deformation at elevated temperature if it encounters large strain reduction [91]. Occurrence of DDRX has been mentioned by several researchers during preparation of AMCs by friction stir processing [34,92]. A typical transmission electron microscopic (TEM) image of quartz particle reinforced AA6063 matrix composite is given in Fig.…”

“…6. Khodabakhshi et al [34] measured the grain size and misorientation angles of a TiO 2 nanopowder reinforced AMC fabricated by FSP route (Fig. 7).…”