Cold Pressure Welding of Aluminum and Copper by Butt Upsetting

概要

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Multiple stage butt welding is attempted. The advantage of this welding is that bonding can be accomplished with a small load and a small deformation by selecting a proper initial height and a proper height reduction in each stage. The effects of the virgin surface ratio and the normal pressure at the bonding surface on the bond strength are investigated. The advantage of the multiple welding is explained by those two parameters. The bond strength is significantly depending on the virgin surface ratio. When the virgin surface ratio is high, the normal pressure is comparatively low, namely, nearly the same pressure as the tensile strength of the base metal.
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