Friction-stir welding is often a solid-state joining process that works on the third body tool to join two facing areas. Heat is generated involving the tool and material which leads to a very soft region near the FSW tool. It then mechanically intermixes both the pieces of metal with the place of the joint, then the softened metal is usually joined using physical pressure, much such as joining clay, or perhaps dough.
Friction-stir Welding
