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________ is a discontinuity consisting of localized melting of the base metal or finished weld caused by the initiation of an arc.
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________ is a discontinuity consisting of localized melting of the base metal or finished weld caused by the initiation of an arc.

User Therealrootuser
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Final answer:

Arc blow is a discontinuity consisting of localized melting of the base metal or finished weld caused by the initiation of an arc.

Step-by-step explanation:

The discontinuity being referred to in the question is called arc blow. Arc blow is a localized melting of the base metal or finished weld caused by the initiation of an arc. It is a common issue in welding and can occur due to magnetism or residual stresses in the material.

User Kalkin
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