Friction Stir Welding
Friction Stir Welding (FSW) was invented in 1991 by Wayne Thomas at TWI. The process operates below the melting point of the workpieces which leads to very high strength and minimal distortion.
The process is used in many sectors including: aerospace, railway rolling stock, automotive and ship building.
It is increasingly being adopted by electric car manufacturers for the production of battery trays.
Benefits of the process include greater weld strength, little or no post-weld repair, no welding fumes or gases, minimal workpiece distortion, little to no porosity, no filler metals required, improved corrosion resistance, no solidification cracking and lower cost in production applications.