Source: Wikipedia Friction stir welding is a process of welding without having to melt the workpiece material. In traditional welding, heat is used to melt pieces of material together. Stick welding or shielded metal arc welding (SMAW), metal inert gas welding (MIG), and tungsten inert gas welding (TIG) are three main types of welding that incorporate the use of direct heat … [Read more...]