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4. It can appear on the surface, in the weld metal or the area affected by the intense heat???​

Sagot :

Answer:

Weld Crack

It can appear on the surface, in the weld metal or the area affected by the intense heat.

Explanation:

The major cause of a crack is when internal stresses exceed the strength of the weld metal, the base metal, or both. And once a focal point for these stresses—that is, a stress riser—develops and accumulates, a crack can propagate.