Characterization of microstructure and mechanical properties of friction stir welded AlMg5- Al2O3 nanocomposites

Microstructure, Mechanical, and Impression Creep Properties of AlMg5–0.5 vol% Al2O3 Nanocomposites

“…The grain size values observed from TEM micrographs of AlMg5–0.5Al 2 O 3 samples are in good agreement with EBSD results. Clustered as well as dispersed nanosized Al 2 O 3 reinforced particles at grain boundaries and grain interiors of AlMg5–0.5Al 2 O 3 samples were reported in our previous work . High activity of aluminum matrix due to fine grain size and high defect density, the presence of carbon source from the SA and driving force offered by thermal energy during hot pressing, has resulted in the formation of Al 4 C 3 nanophase in AlMg5‐M and AlMg5–0.5Al 2 O 3 samples as shown in TEM micrographs .…”

“…Clustered as well as dispersed nanosized Al 2 O 3 reinforced particles at grain boundaries and grain interiors of AlMg5–0.5Al 2 O 3 samples were reported in our previous work . High activity of aluminum matrix due to fine grain size and high defect density, the presence of carbon source from the SA and driving force offered by thermal energy during hot pressing, has resulted in the formation of Al 4 C 3 nanophase in AlMg5‐M and AlMg5–0.5Al 2 O 3 samples as shown in TEM micrographs . Al 2 O 3 nanoparticles present in the AlMg5‐M samples could be attributed to the oxidation of highly chemically active Al atoms during milling and consolidation processes .…”

Solid State Processing of Aluminum Matrix Composites Reinforced with Nanoparticulate Materials

“…FSW processing involves severe plastic deformation at high temperature and this thermomechanical processing of the matrix results in the modification of the matrix also with respect to the grain morphology and strain hardening condition. This influence of matrix on the FSW processed nanocomposites is more prominent in Al matrix composites processed by powder metallurgy route with nano sized reinforcements, where reinforcement breakdown during FSW processing is minimal compared to the matrix microstructural changes . It is worth mentioning that the matrix microstructural changes not only depend on the FSW parameters but also greatly influenced by the initial condition of the matrix.…”

“…One approach for the higher effectiveness of planetary milling could be adjusting the shape of the milling vessel. Therefore, ball milling in cubic shaped vessel was investigated . For instance, the same powder composition AlMg5–1 vol% nano‐Al 2 O 3 was milled under the same conditions in a Retsch mill PM400 and in the Cube‐mill a joint development from the companies TSB (Germany) and Reishauer AG (Switzerland).…”

“…Babu et al have performed friction stir welding of hot‐pressed bulks prepared from unmilled AlMg5, milled AlMg5, and milled AlMg5–0.5 vol% Al 2 O 3 powders and reported on the weld microstructures and mechanical properties . Macrograph of the milled AlMg5–0.5Al 2 O 3 weld zone showed wider nugget zone compared to the welds prepared using AlMg5–UM and AlMg5–M base metals.…”