If ABS and PC are to friction stir welded, why the offset is important, which side, how much and what is its effect?

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Ramesh Kumar

Offset is required in friction stir welding of the dissimilar materials. For complete flow of the material in the stir region. Offset should be given in the soft material side.

Pramod Vadavkar

The heat generated in both the materials must be sufficient to bring both the materials to the same viscosity simultaneously so that they are able to mix intimately due to the stirring action. Offset is given to generate more heat in one material compare to the other.