The definition and Type of Fusion Welding

Fusion welding is a generic term for welding processes that rely upon melting to join materials of similar compositions and melting points.Due to the high-temperature phase transitions inherent to these processes, a heat-affected zone is created in the material(although some techniques, like beam welding, often minimize this effect by introducing comparatively little heat into the workpiece).
Contrast with solid-state welding which does not involve melting of materials.

Types of fusion welding include:
Arc welding
Oxy-fuel welding
Electric resistance welding
Laser beam welding
Electron beam welding
Thermite welding

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