Multiple choice

Within the Heat Affected Zone (HAZ) in a fusion welding process, the work material undergoes

  1. microstructural changes but does not melt

  2. neither melting nor microstructural changes

  3. both melting and microstructural changes after solidification

  4. melting and retains the original microstructure after solidification
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A Correct answer
Explanation

The heat affected zone (HAZ) is the area of base metal which is not melted & has had its micro structural & properties altered in Fusion welding. The extend & magnitude of property change depends primarily on the base material, the well filler metal, amount & concentration heat input by Fusion weld process.

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