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|NDT.net Issue - 2012-12 - NEWS ||NDT.net Issue: 2012-12|
Publication: e-Journal of Nondestructive Testing (NDT) ISSN 1435-4934 (NDT.net Journal)
TWI publishes ground breaking developments for friction stir welding of steelTWI Ltd (The Welding Institute)193, Great Abington, Cambridge, United Kingdom
Following its widespread acceptance by the aerospace, shipbuilding, train making and automotive industries for manufacturing aluminium structures, TWI is developing friction stir welding (FSW) for application to steel. Recent work at TWI Technology Centre in Yorkshire has shown that welds in steel made by friction stir welding have considerably better mechanical properties than those made by conventional arc welding, for example significantly improved toughness and fatigue lives. The lack of melting and thus low heat input characteristic of the friction stir welding process reduces distortion in the welded structures.
Results just published show that for 6mm thick, high strength shipbuilding steel, FSW reduces distortion along the length of a 2m welded plate from 115mm to 15mm while tripling weld toughness and increasing fatigue life compared to submerged arc welding. As up to 40% of the costs of building a ship are associated with correcting distortion of welded plates, this new technique has potential to introduce considerable cost savings during manufacture.
Please contact us or see the Friction Stir Welding section of our website for further information: