Cold_welding | TriviaQuestions.online

⭐ In the context of Welding, cold welding is considered…

Cold welding is categorized as a solid-state welding process because it achieves bonding through pressure or diffusion, rather than melting the materials being joined, unlike fusion welding techniques.

⭐ Core Definition: Cold welding

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.

Cold welding was first recognized as a general materials phenomenon in the 1940s. It was then discovered that two clean, flat surfaces of similar metal would strongly adhere if brought into contact while in a vacuum (see Van der Waals force). Micro and nano-scale cold welding has shown potential in nanofabrication processes.

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👉 Cold welding in the context of Welding

Welding is a fabrication process that joins materials, usually metals or thermoplastics, primarily by using high temperature to melt the parts together and allow them to cool, causing fusion. Common alternative methods include solvent welding (of thermoplastics) using chemicals to melt materials being bonded without heat, and solid-state welding processes which bond without melting, such as pressure, cold welding, and diffusion bonding.

Metal welding is distinct from lower temperature bonding techniques such as brazing and soldering, which do not melt the base metal (parent metal) and instead require flowing a filler metal to solidify their bonds.

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