EXPERIMENTAL INVESTIGATION OF FRACTURE CHARACTERISTICS OF Al-Mg/Gr-SiCp
COMPOSITE SPUR GEAR FOR LIGHT DUTY APPLICATIONS
Abstract
Al-Mg/ (Gr+SiCp) composite material test specimens and gears using the
liquid based stir casting process. The three particle sizes (10µm, 35µm
and 65µm) and two weight fractions (5 and 10) of silicon carbide
particle were reinforced in to the Al6061 and 2.8 wt. % of magnesium
matrix metal alloy. Graphite was also added before the stirring to
increase the wear resistance of the material during turning and hobbing
of gear blanks. The fracture toughness was evaluated using Charpy impact
test (ASTM E23 standards). The Charpy impact test was carried out for
understanding the influence of SiC reinforcement with Al/Mg alloy. The
results shows that reinforced aluminium matrix composite material having
highest fracture toughness with lower contribution of ceramics SiC and
increased in particle size than other composition.