- Friction Stir Welding - FSW
- Friction Stir Spot Welding – FSSW
- Friction Spot Welding – FSpW
- Friction Hydro Pillar Processing - FHPP
- Friction Surfacing
- Rotational Friction Welding
- Fric Riveting
- Injection Clinching Joining
For FSW and associated processes, foremost Al- und Mg-alloys and very hard steels are used, whereby Ti- alloys and corrosion resistant steels (for HFDB) and Polymers (for FricRiveting und ICJ) act as joining partners. With exception of the ICJ-process, all above mentioned joining processes are based on similar physical and metallurgical processes. This singularity allows a simple depiction of the relevant scientific topics. (Please refer to Tabelle 1).
With the formulation of technological solutions and concepts for joining challenges for the national and European industry, a significant contribution is made in the programme topic "Mechanics and Joining of Light-Weight Materials" of the programme "Advanced Engineering Materials” within Helmholtz-Research-Area "Key Technologies ".
Table 1 – Scientific topics in the area material, process, and properties for the group Solid State Joining Processes.
|High Temperature Plasticity||Understanding Bonding Processes||Determination of Properties|
|Recovery and Re-crystallisation||Energy Balance for Solid State Joining Processes||Failure Mechanisms of welds|
|Non Plasticity||Eigenspannung und Verzug|
|Interfaces and Surface Processes|
The technological topics are tightly connected to the scientific topics and are normally investigated together with industrial partners (Table 2)
Table 2 –Technological topics for the group Solid State Joining Processes
|FSW:||*Investigations on weldability of hybrids: Steel/Mg-alloys, Steell/Al-alloys *Failure development mechanisms for FSW of Al-alloys *Repair of FSW-welds *Development of Bobbin-Tool-Technology for Al-alloys *Plastic deformation of FSW-welds *Productivity increases for FSW (High Speed FSW) *Investigation of the weldability of modern steels with FSW|
|Friction Stir Processing:||Functionalisation of surfaces|
|Polymer Metal Joints:||Process technology and parameters of the welds|
|FHPP of light weight metals:||Process technology and parameters of the welds|
|Friction Surfacing:||Development of laminate materials and relevant process technology|
|Hybrid Friction-Diffusion Bonding (HFDB):||Process technology and parameters of the welds|
|Friction Spot Welding:||Process technology and parameter of the welds|