Friction stir welding

From GAWDAwiki

Friction stir welding utilizes a rotating tool progressing along a joint to heat and forge metals.^[1] After the non-consumable rotating tool is applied to the base metals, a central pin, or probe, makes contact with the parts to be joined, followed by the shoulder. As the tool rotates and progresses down the joint, it heats and plasticizes the materials where it makes contact, sweeping them behind it and eliminating the interface. See also: Friction welding.^[2]

Advantages of Friction Stir Welding

1. Excellent weld quality
2. Mechanical properties equal to or better than those achieved by fusion welding
3. Environmentally friendly—no fumes or spatter are generated
4. No arc glare or reflection of laser beams
5. Minimal distortion and residual stress
6. Able to weld dissimilar metals^[2]

References

1. http://www.bocindustrial.co.uk/bocindustrial/technical/glossary/a.asp
2. http://www.azom.com/details.asp?ArticleID=1170