KEKUATAN TARIK DAN POROSITAS SILINDER AL-MG-SI HASIL DIE CASTING DENGAN VARIASI TEKANAN
ABSTRACT: Tensile strength and
porosity of die-casted Aluminum Alloys Al-Mg-Si with various applied pressure
were investigated. Al-Mg-Si was melt in the electric induction crucible with
temperature of 850 degree Celsius. Melt aluminum was poured in the metallic
mould that pre-heated in 150 degree Celsius. Melt aluminum was pressed by the
plunger with pressure of 0.1, 10, 30, and 50 MPa and held for 5 minutes. After
aluminum was solidified, specimens for tensile strength and porosity test were
machined. Tensile strength, porosity test and microstructure observation were
conducted. Results of tensile strength and porosity test show that the higher
plunger pressure, porosity becomes lower and tensile strength of specimens to
be higher. Maximum tensile strength occurs in the specimens that pressed in 50
MPa. It occurs due to minimum porosity and small grains of microstructure in
the specimens.
Penulis: Yudy Surya Irawan,
Tjuk Oerbandono, Dian Fitria Agus Aristiyono, Pratikto
Kode Jurnal: jptmesindd130287
