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Equal channel angular pressing of gas tungsten arc welded AA6061 alloy

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Abstract

Post weld heat treatment is the most widely used technique to restore the strength of aluminum welds by recrystallization of precipitates and often requires cumbersome, energy intensive, and time-consuming heat treatments. Equal channel angular pressing (ECAP) is proposed for the first time as an alternative to the heat treatment of welded AA6061 samples, welded by the gas tungsten arc welding process, and processing was performed in two different orientations of the work piece with respect to the position of the weld bead. Both orientations of the ECAP process produce significant modifications to the mechanical and metallographic properties of the work piece. Characterization of the ECAPed specimens shows that usage of ECAP as an alternative to heat treatment is viable and the second variant of ECAP proves more effective than the first. ECAP restores the strength of the joints on par with heat treatment with better ductility and consumes very less time, and hence, it is very desirable than post weld heat treatment.

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  1. R.M.K College of Engg & Tech, Puduvoyal, Thiruvallur, 601206, India

    N. Sadasivan & M. Balasubramanian

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  1. N. Sadasivan
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  2. M. Balasubramanian
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Correspondence to M. Balasubramanian.

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Sadasivan, N., Balasubramanian, M. Equal channel angular pressing of gas tungsten arc welded AA6061 alloy. Weld World 64, 1053–1064 (2020). https://doi.org/10.1007/s40194-020-00897-0

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