Cold welding

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Invention

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Science and technology

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What Wikipedia says

Cold welding or contact welding is a solid-state welding process in which joining takes place without fusion or heating at the interface of the two parts to be welded. Unlike in fusion welding, no liquid or molten phase is present in the joint.

Excerpt from the Wikipedia article “Cold welding”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Talifero, CC0, via Wikimedia Commons.