The Tensile Stress Enhancement of Corner-Lap Joint 45° (C-L45) USING Friction Stir Welding

This research used aluminum 6061 with the dimension of 150 mm length, 50 mm wide, and 10 mm thick, milled to form 45° edge angle for joining process. The shoulder probe was simply designed and made from hardened EMS 45 Probe treatment is carried out, heated to a temperature of 900 degrees Celsius, hold for 5 h to get the austenite phase, then cooled quickly with water to get the martensite phase to get a hardness of 62 Hrc. The micro structure and temperature distribution were observed and the MgO substance was measured using X-Ray Diffraction. Using a scanning electron microscope, the micro hardness and tensile strength tests were performed. This experiment sought for the correlation of the material’s micro structure, temperature, and tensile stress. In this experiment a simple milling machine was used, the feedrate speed can be adjusted automatically, a JIG Pixture was used so that it remained strong and did not move. The adjusted parameters were the feedrate speeds that ranged from 10 mm/min, 15 mm/min, and 30 mm/min and the spindle rotation speed set constantly on 2000 rpm. 6061 aluminum is used at both ends, 150 mm is made at a 45° angle so that solid welding can be carried out with good results, then a hole with a diameter of 2 mm is made for the data logger thermocouple. 24 thermocouples were installed on the material to measure the temperature distribution. The result, of the research can be carried out well the tensile stress score was 154.67 MPa, acquired from 10 mm/mnt feedrate speed. The highest temperature distribution recorded on such feedrate speed was around 223–484.9 °C and the lowest one was 242–311 °C with the a tensile test score at 125 Mpa. Those results were clarified by the a micro and macro structure formed.