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                                                    Setting the scene and where to go                                     07.03.2022

 

Multi-material lightweighting concepts using steel and aluminum are emerging to boost vehicle performances. Smart material joining is detrimental for such concepts’ success. Mechanical joining as Self-pierce riveting (SPR) or Flow drew screw (FDS) that are currently used for multi-material joining add undesired weight and costs compared to traditional welding used for homogeneous materials. To outrun these shortcomings of mechanical joining  the STir4Steel consortium strives for developing new friction stir welding technologies. The ambitious main general requirements defined for this new joining solutions to be developed include especially:

  • Avoid part distortions (respect assembly tolerances currently in production)

  • Assure a proper joining in terms of mechanical strength and weld quality

  • The mechanical strength must be equal or higher in respect to conventional joining configuration (FDS and SPR)

  • Assure corrosion protection

Demonstrator

One of the 4 demonstrators  tackled in Stir4Steel –

friction stir spot welding of a AHSS B-pillar and Al-door frame assembly

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This project has received funding from the Research Fund for Coal and Steel, a programme managed by the European Commission, supporting research in the coal and steel sectors in Europe under grant agreement No. 101034068. 

© 2024 Stir4Steel

Facts and Figures

  • Start date:     1st of September 2021

  • Duration:       36 months

  • EC Funding:  EUR 1.17 M

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