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Introduction


Welding using friction as the major resource
No filler material involved
Welds created by,
a) Frictional heating
b) Mechanical deformation

History
Invented by TWI in 1991 in England
28 organizations worldwide use FSW

Friction Welding

Heat from mechanical energy conversion

Linear friction welding
Rotary friction welding
Material Suitability

Copper and its alloys
Lead
Titanium and its alloys
Magnesium alloys
Zinc
Plastics
Mild steel
Stainless steel
Nickel alloys


Advantages
Diverse materials: Welds a wide range of alloys, including previously un-weldable (and possibly composite materials)
Durable joints: Provides twice the fatigue resistance of fusion welds.
Versatile welds: Welds in all positions and creates straight or complex-shape welds
Retained material properties: Minimizes material distortion
Safe operation: Does not create hazards such as welding fumes, radiation, high voltage, liquid metals, or arcing
No keyholes: Pin is retracted automatically at end of weld
Tapered-thickness weld joints: Pin maintains full penetration


Conclusion


An alternative to fusion welding
Advanced technologies are in the offing