Analysis of Welded Structures. Residual Stresses, by Koichi Masubuchi

By Koichi Masubuchi

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GTA. The process involves no flux, but is slow and not commonly used for joining heavy plates. 04 in. (1 mm). 25 in. 4 mm). GMA. The process is faster and cheaper and requires less manual dexterity than GTA. 081 in. (2mm) and higher. No preheating is required. This is the most common type of welding used for aluminum fabrication. ) Welding position 3 32 Flat 1 8 1 4 Joint design None Current amps-dc Arc Filler Argon(fl) voltage wire dia. gas flow CFH 70-110 100-120 18-22 18-22 Flat None Horiz. & vert.

It is a weldable Mg-Mn alloy formable, highly corrosion resistant, has a high weld zone ductility and high strength. Advances in 5052, 5083, 5086, and 5456 welding make realistic the welding of aluminum in applications where welds are subject to heavy dynamic loading. 6xxx series. A heat-treatable material, this alloy has sheets, plate and extrusions two-thirds to three-quarters less in strength than the 2xxx series. However, it is easily available, weldable and cheap, which makes it practical for structures with low dynamic loading factors.

5083, HI 13, fin. 5083, HI 13, | in. 2% offset. Based on the typical tensile strength shown in the Kaiser Aluminum Sheet and Plate Book, Second Edition, 1958. typical mechanical properties of GMA welded joints in aluminum alloys 5086 and 5083. (116) Problems in welding aluminum. As described above, aluminum alloys are definitely weldable. However, this does not mean aluminum welding is problem free. Major problems in welding aluminum include: 1. Porosity in welds. Compared with steel, aluminum alloys are more active and thus are prone to weld porosity.

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