Heat-affected zone

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Science and technology

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What Wikipedia says

In fusion welding, the heat-affected zone (HAZ) is the area of base material, either a metal or a thermoplastic, which is not melted but has had its microstructure and properties altered by welding or heat intensive cutting operations.

Excerpt from the Wikipedia article “Heat-affected zone”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Ytrottier, CC BY 2.5, via Wikimedia Commons.