Dissimilar Welding by Friction Stir Welding of C3064 Brass with AA1100 Aluminum Alloy

Abstract

Abstract-This research aims study parameters in the dissimilar butt-joint of AA1100 aluminum alloy with C3604 brass by using a FSW process. The parameter is rotation speed 660, 1110 and 1320 rpm, travel speed at 80 and 160 mm/min, lead angle 3 degree and pin tool cylindrical shape from JIS-SKH 57 carbon steel. The experimental results show that FSW between both materials bonded together very well. The increase of rotation speed with lower travel speed is likely to increase the tensile strength as well. The highest tensile strength was 49.25 MPa from rotation speed 1320 rpm and travel speed at 80 mm/min. On the other hand, at lower rotation speed and a high travel speed, a low tensile strength of 25.35 MPa was observed from rotation speed 1110 rpm and travel speed at 160 mm/min. After FSW, the hardness properties were changed in FZ due to the flow of meat material, which their average hardness was around 53 HV. The microstructure of both materials was changed in FZ forming friction force and thermal temperature, it also found that the joint are alternately flow of meat material of both types.Keyword -Friction Stir Welding, C3604 Brass, AA1100 Aluminum Alloy, Dissimilar Welding. These processes provide many advantages; especially FSW process due to filler metal, non-consumable tool, low power consumption, joint high strength, ability to weld different materials and environmentally friendly. This FSW process was patented in 1991 by The Welding Institute (TWI) of Cambridge, England. INTRODUCTION[6] However, the FSW process often used aluminum alloy or other materials which their melting points are not high. This is because they rely on heating from friction force. In general, FSW process is used for welding between different materials, which is easier than liquid state welding process. The mechanism of FWS process starts by a rotating tool plunged into specimens until the tool shoulder is contacted on the surface of the specimens. Then, the heat from the friction softens two different materials and the rotation speed generates the flow of meat material until the two materials bonded together. The parameters for FSW process are rotation speed, travel speed, plunge load or plunge position, tool lead angle and tool design/geometry., etc.[7] The AA1100 aluminum alloy is commonly used due to its good thermal properties and easy to acquire [8]. Likewise, C3604 brass is a popular material due to its good electrical properties and corrosion resistant [9]. For welding both materials together, it is difficult but interesting because chemical compositions, microstructure and melting point are totally different. Thus, this research studied the optimum parameters that affect joint welding of AA1100 aluminum alloys with C3604 brass by FSW process. This interesting result from changes in the structure of joint area and mechanical properties after welding was observed. EXPERIMENT Material preparationThe C3604 brass and wrought AA1100 aluminum alloy were materials used for this FSW process. These specimens were prepared to be sheets...

Investigation Toiler Weld Blank of SSM 2024 Aluminum Alloys by Friction Stir Welding Joint

“…It was found that the SZ had a higher hardness than that of the base metal (BM) caused by the effects of friction force that also caused Al2Cu phase to be broken and dispersed around the SZ. Moreover, the heat was another cause that affected the structural changes of the SZ until it led to increased hardness [13]. The intermetallic compound was formed by heat, and the transition of the eutectic phase in various forms would promote good hardness.…”