Analisis Pengaruh Bahan Pin Terhadap Sifat Mekanik Dan Struktur Mikro Sambungan Plat Tembaga Pada Proses Friction Stir Welding

Welding in the manufacturing industry has an important role in the process of connecting metals. One of the welding methods is Friction Stir Welding (FSW). FSW welding method is utilizing the friction that occurs between the tool and the workpiece to be connected. This connection occurs because of the stirring of two sides of metal pieces that have begun to soften. This study aims to determine the mechanical properties and microstructure of copper plate joints in the friction stir welding process with a variety of pin materials. Welding in this study uses copper material, the connection uses a butt joint, the parameters used are the rotational speed of 1250 rpm, the feed speed is 12.5 mm / minute. The pin material uses AISI 4340 steel, AISI O1 and AISI D2. The analysis was carried out by tensile testing, micro vickers and micro photographs. The results of this test show the maximum tensile stress and maximum welding stress using the AISI O1 joint tool with a tensile stress value of 213.43 Mpa and a maximum strain of 3.81%. Hardness testing in the stir zone area all experienced an increase in hardness value compared to the HAZ and base metal regions. The results of microstructure testing on the stir zone area of all welding results change in grain size to be very small and look smooth compared to HAZ and base metal