Pengaruh Penambahan Unsur Magnesium pada Paduan Aluminium dari Bahan Piston Bekas

Abstract

In general, 70% by weight of automotive components were made of aluminum, and automotive products are made of aluminum, such as piston, engine block, cylinder head, and alloy wheel. In the use of aluminum materials in automotive components, it is necessary to have a good mechanical strength value. Engineering materials can make aluminum metal products by adding elements such as Cu, Si, Mg, Zn, Mn, Ni in the alloys. This study aims to analyze the tensile stress and elastic modulus of Al-Si material from used diesel piston materials. The impact test aims to determine the material toughness of swingarm motorcycle manufacturing applications. The remelting of the diesel piston process used to add the magnesium (Mg) with variations of 0, 2, 3, and 5% in the alloy. Casting the Al-Si aluminum uses sand molds and makes test specimens with ASTM-E8M standardization for tensile tests and ASTM-E23 for impact tests. The results obtained in tensile and impact tests were intended to get tensile strength, modulus of elasticity, and tenacity. Optimization of adding 3% Mg can produce better Al-Si alloy properties