Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695



Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695
Textbook Problem

How can a notch cause incomplete fusion?

To determine

The cause of incomplete fusion when a notch is present.


Incomplete fusion occurs when molten filler metal gets mixed with the filler material deposited earlier. This process is called as interpass cold lap. Presence of a notch can cause the metal to fuse incompletely. Presence of filler metal between the parent metal cause incomplete sidewall fusion.

Any kind of notch present should be removed to obtain complete fusion. Fusion of materials depends on the size of hole and depth of penetration. Both the parent metals should have common temperature.

Sketch of incomplete fusioncan be seen on given images below...

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