Answer :
Final answer:
A weld consists of three zones: the weld metal zone (the actual weld itself), the heat-affected zone (the area whose properties have been changed due to the heat), and the base metal zone (the material being repaired or joined).
Explanation:
The three zones of a weld are the weld metal zone, the heat-affected zone (HAZ), and the base metal zone. The weld metal zone comprises of the area where the filler metal has been deposited during the welding process. It is the actual weld itself. The heat-affected zone (HAZ) is the area that has not been melted but its properties have been altered due to the heat of welding. The base metal zone is the material that is to be joined or repaired. This zone remains unaffected by the heating process.
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