Question

Autogenous TIG welding will produce weld zone by

1.  Plastic deformation of faying surfaces

2.  Melting and solidification of faying surfaces

3.  Melting and solidification of filler wire

4.  Both a and b

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Answer 1

3)is ur answer............

Answer 2

Out of Plastic deformation of faying surfaces, melting and solidification of faying surfaces and melting and solidification of filler wire, autogenous TIG welding will produce weld zone by the melting and solidification of faying surfaces.

In this kind of welding, no extra filler rod gets used as the procedure is purely based upon the metal which forms the base or something of similar composition.