Hot Pressure Welding of Aluminum Alloys.
Final rept. Jan 70-Dec 74,
AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO
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The welding of butt joints in 1100, 6061, 7075 aluminum by the hot pressure welding process with a vacuum atmosphere has been studied. Solid cylinders were welded in a closed die. The tensile strength joint efficiency of 1100 aluminum welds was 100 at a welding temperature of 600 C with 24 weld deformation and also at 500 C and 44. Alloy 7075 welded at 490 C and with 20-30 deformation exhibited a joint efficiency of 100 in the as-welded condition and 93 in the T6 condition. The tensile elongation of welds was good, except for 7075 aluminum in the T6 condition. This was about 1, which increased to about 2 after postweld diffusion treatment. Abrasion of the faying surfaces by preweld relative movement of a ringshaped specimen on a flat sheet was of only limited effect in improving weld strength. Joint efficiencies of 100 based on annealed strengths were achieved with 1100 and 6061 aluminum, but not with 7075 aluminum. Author
- Metallurgy and Metallography
- Fabrication Metallurgy
- Couplers, Fasteners and Joints