PENGARUH KECEPATAN PUTAR PIN TOOL TERHADAP HASIL KEKERASAN DAN SIFAT TARIK FRICTION STIR WELDING DOUBLE SIDED ALUMUNIUM SERI 1XXX DAN SERI 5XXX

This research was conducted to provide information of the results of friction stir welding double sided aluminum 1xxx and aluminum 5xxx. Double sided FSW in used because research using double sided studies with similar material that have been done. While aluminum 1xxx and aluminum 5xxx were chosen because these material are rarely used in double sided friction stir welding. The purpose of this study was to determine the effect of tool rotational speed on physical and mechanical properties of double sided aluminum 1xxx and aluminum 5xxx FSW. The material used in this study is aluminum 1xxx and aluminum 5xxx which have dimension of 100mm × 65mm and have a thickness of 5mm. Feed rate 5.0cm/minute, while the pin tool rotational speed used is 910rpm, 1500rpm and 2280rpm. The results of the joint were tested by looking at their macro and micro structure, vickers micro hardness and tensile test with ASTM E-8 atandard. The results show that the lower rotational speed will result in more and more possibilities of defects. At a rotating speed of 910rpm an incomplete fusion defect occurs. In microstructure, the higher the rotation speed, the smoother the results. For hardness result, the lower the rotational speed, the higher the value. On the results of the tensile strength the highest yield is a rotation speed of 2280rpm whis is 105.81 MPa. Whereas the lowest yield happens on a loop 1500rpm, whis is 95.37 MPa.