Friction Welding
Fleeting- External reference: https://hackaday.com/2014/12/30/3d-printing-technique-friction-welding/
New 3D Printing Technique – Friction Welding
“Friction welding” is the process of rubbing two surfaces together until the friction alone has created enough heat to join them. Industrially, the method is applied to joining large, metal workpieces that would otherwise require a time-consuming weld
— https://hackaday.com/2014/12/30/3d-printing-technique-friction-welding/