PHYSICAL AND MECHANICAL CHARACTERIZATION OF AL-SI ALLOYS WITH THE ADDITION OF MG AS MATERIAL OF THE CHASSIS MODEL MADE BY THE HIGH-PRESSURE DIE-CASTING (HPDC)
ABSTRACT: Aluminium alloys
have been developed for the automotive material, especially in the chassis
structure. One of the development of aluminum alloy focuses on the system of
Al-Mg-Si. This paper presents results on a manufacturing chassis car model made
by Al-Si alloys with variety of magnesium content through the HPDC process. In
this study, the selected raw material is ADC12, while HPDC wasm performed at a
constant pressure of 7 MPa. The optimal composition of a super ductile alloy of
Al-MgSi was related to the Mg variation in wt.%; 0, 3, 4 and 5 and the pouring
temperature of 750 OC. Theheat treatment was performed at the age hardening
treatment at 540 OC for 60 minutes and artificialaging of 150 OC for 4 hours. Material
characterization includes porosity, hardness testing and microstructure
evaluation using an optical microscope. The measured data of porosity,
hardness, tensile strength were compared to that of standard data for
automotive chassis material. It shows that the measured hardness met the
required standard of automotive material.
Author: Athanasius P.
Bayuseno, Akhmad Ibrahim Jayeng Kelana, Dedas Agusta
Journal Code: jptmesingg160002
