PENGARUH MAGNESIUM TERHADAP KEKERASAN DAN KETAHANAN AUS KOMPOSIT ALUMINIUM 6061/nano-Al 2 O 3 DENGAN METODE STIR CASTING
ABSTRACT: Aluminum composite
6061/nano-Al 2 O 3 is a material that
utilizes aluminum 6061 as a matrix. Aluminum 6061 is aluminum alloys with
magnesium. The mechanical properties of aluminum 6061 are lower than the steel.
To increase the mechanical properties of aluminum 6061, nano-Al 2 O 3 particle
is added as reinforce. Problems encountered in the manufacture of these
composites are the bond between the matrix and the reinforcement. Aluminum 6061
and nano-Al2O3 cannot form a bond each other so it is necessary to add a
wetting agent to improve bonding between aluminum 6061 and nano-Al 2 O 3 .
Wetting agent used in this study is magnesium with purity levels reached 99%. The
magnesium is added by 1%, 3% and 5%. Stir casting process is used in this study
in order to mix aluminum, alumina and magnesium evenly. Then hardness test and
wear test are performed to determine the mechanical properties of the composite
6061/nano-Al 2 O 3 . The results show that the hardness is increased about 44
HRB with adding magnesium of 5%. The wearing resistance is also increased which
is marked by the lower rate of the wear until reached 2.86 x 10 -3 mm 3 /m.
Penulis: Rochmad Eko
Prasetyaning Utomo, Salahuddin Yunus, FX Kristianta
Kode Jurnal: jptmesindd160325
