PENGARUH WAKTU AGING TERHADAP KEKERASAN DAN STRUKTUR MIKRO KOMPOSIT Al-Si-Mg/Al2O3 DENGAN METODE STIR CASTING
Abstract: Aluminum composite
needs proper aging period to achieve its optimum mechanical properties
through precipitation hardening process.
In this research, alumina (Al2O3) particulate reinforced aluminum alloy 6061
composite which is fabricated by stir casting method, undergoes T6 treatment in
175°C for 2 hours, 4 hours, 6 hours, and 8 hours. Mechanical properties
evaluations such as tensile testing, hardness testing, and wear rate testing; also microstructure and
SEM observation are conducted. Research shows that the optimum
artificial aging period for the aluminum composite is 6 hours in 175°C.
Wear rate decreases after T6 treatment
applied. Hardness increases after
T6 treatment applied with aging period of 4 and 6 hours. Tensile strength
decreases compared to as-cast composite due
to formation of
void at interface
when T6 treatment conducted. Manufacturing factors will affect the
mechanical properties of composite.
Penulis: Salahuddin Junus, Anne
Zulfia, Melisa Melisa, Lilis Mariani
Kode Jurnal: jptmesindd140522
