where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -
Beta-Version of this Page View
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 steel

TWI Ltd (The Welding Institute)186, Great Abington, Cambridge, United Kingdom

Friction stir welding, as used in aluminium rail cars for example, can now be used for steel
Stephen Cater, a researcher at TWI Technology Centre at the Advanced Manufacturing Park, Sheffield, has presented ground-breaking results on friction stir welding of steel at the 9th International Conference on Trends in Welding Research, Chicago, USA. Friction stir welding was initially invented by TWI for welding aluminium and has quickly become the process of choice for world-leading manufacturers such as Boeing, SpaceX, Hitachi, Mazda and Volvo for the fabrication of strong, stiff, lightweight aluminium structures.

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.

Process advantages:
Unlike conventional welding techniques, FSW does not melt the metal being welded and results in strong, defect-free welds without fear of health and safety concerns from any of molten metal, fumes or ultra-violet light. The process also offers cost savings when compared with conventional arc welding of aluminium.

Industry benefits:

  • Stronger welds than currently possible using existing techniques
  • Very low distortion, making significant savings on rework and post-weld straightening
  • Improved fatigue and toughness, leading to better in-service performance
  • Improved Health and Safety conditions in the welding environment.

    Please contact us or see the Friction Stir Welding section of our website for further information:

    TWI Ltd
    Granta Park
    Great Abington
    Cambridge CB21 6AL
    United Kingdom
    Phone: +44 (0)1223 899000
    Fax: +44 (0)1223 892588

    Visit: TWI Ltd (The Welding Institute)

    Feedback: ()

    More from "TWI Ltd (The Welding Institute)" (5 of 187)
    2019-10Artificial Intelligence Approaches as Tools for Auditing and Improving Data Analysis of Advanced Ultrasound Techniques in Non-Destructive Testing
    2019-09Experts to attend Materials Testing Exhibition in Telford
    2019-09Dave Holmes named as New President of the Welding Institute
    2019-06OPTRAIL - Risk-Based Inspection for Optimised Maintenance
    2019-05Digital Radiography Inspection of Flexible Risers in Offshore Oil and Gas Industry
    ... All 187 Details >
    We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
    this is debug window