Pengaruh Kedalaman Pin (Depth Plunge) Terhadap Kekuatan Sambungan Las Pada Pengelasan Adukan Gesek Sisi Ganda (Double Sided Friction Stir Welding) Aluminium Seri 5083

摘要

Welding in the manufacturing industry has an important role in theudprocess of joining metals. One method of welding metal is friction stirudwelding / friction stir welding (FSW). Friction stir welding method ofudwelding is welding by utilizing the heat due to rotation of the tool that isudrubbing against the parent material or workpiece. Friction stir weldingudmethod is generally used to connect the aluminum material. The purposeudof this research was to determine the effect of the depth of immersion pinud(depth plunge) to changes in physical and mechanical properties of frictionudstir weld double sides (double sided friction stir welding).udThis study was conducted using a vertical milling machine forudmaterial Al 5083 with the long dimension of 200 mm x width 100 mm xudthickness of 3 mm by 6 specimens. The parameters used are rotationaludspeed 1250 rpm spindle, feeding speed of 12.5 mm / min, immersionuddepth variation pin 0.9 mm, 1.9 mm and 2.9 mm. After the welding processudis completed followed by tensile testing, testing micro vickers, macroudimage and a micro photograph.udFrom the test results known to the highest tensile stress onudvariations plunge depth of 1.9 mm amounted to 177.78 Mpa. For testingudmicro vickers welding area decreased hardness when compared with theudparent metal and HAZ region has the lowest hardness. While in theudobservation of the macro image of welding is plugged in, but it happens onuda welding defect cavity with variations plunge depth of 2.9 mm. Inudobservation of micro photograph happen diminution grain structure in theudregion stir zone.�