Project description DEENESFRITPL A novel hybrid joining technique enhances the mechanical and chemical properties of joints Joining the large subcomponents of aircraft can be challenging both in terms of the joining process itself and its long-term impact on the integrity of the aircraft. Refill friction stir spot welding is a promising solid-state joining technique using friction to pre-heat and soften a component after which it is shaped to form a joint. The process can lower weight by eliminating fastening elements such as rivets and can also join dissimilar materials. The EU-funded DAHLIAS project is optimising this promising technique and combining it with application of a sealant with adhesive properties. The sealant will not only protect the joint against corrosion but also reinforce its mechanical performance. Show the project objective Hide the project objective Objective The main objective of the DAHLIAS project is to optimise hybrid joining (Refill Friction Stir Spot Welding, RFSSW, with an adhesive sealant bond) for application in aircraft structures. RFSSW is a solid-state joining technology especially applicable to lightweight alloys in similar and dissimilar configurations. The process has been successfully applied to difficult-to-weld and non-weldable alloys and is considered a potential replacement of mechanical fastening. Overlap joints in aircraft structures require the use of sealants for corrosion protection reasons. Using sealants with an adhesive function would complement the high quality joints produced by RFSSW by not only protecting against corrosion but also contributing to the overall mechanical performance of the structure. To achieve the main goal of this project a work plan consisting of eight work packages has been devised. Two work packages are focused on the RFSSW process development using standard samples with and without adhesive sealant. In parallel the adhesive sealant technology, including surface pre-treatment will be developed. The hybrid joining solution developed in this project will be compared to conventional joining technologies to define its potential. Hybrid joining brings a number of advantages to production and performance of aircraft structures. The change from differential to integral design introduces new challenges in the analysis of mechanical performance. Hence, the damage tolerance behaviour of hybrid joints is also investigated in this project. Quality control methods will be investigated by selecting NDT methods and by process control based on online monitoring of parameters. In the last phase of this project technology demonstrators will be produced to evaluate the capabilities of the proposed technology in actual aircraft structures. The consortium (3 R&D and 2 industrial partners) has the exact fitting, prooven expertise and high excellence. HZG (coordinator) holds key patents. Fields of science engineering and technologymechanical engineeringmanufacturing engineeringengineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraftengineering and technologymaterials engineeringcoating and films Programme(s) H2020-EU.3.4. - SOCIETAL CHALLENGES - Smart, Green And Integrated Transport Main Programme H2020-EU.3.4.5.4. - ITD Airframe Topic(s) JTI-CS2-2017-CfP07-AIR-02-58 - Optimization of hybrid joining (Refill Friction Stir Spot Welding + adhesive bond) for increasing mechanical properties and corrosion protection of the joints [SAT] Call for proposal H2020-CS2-CFP07-2017-02 See other projects for this call Funding Scheme CS2-IA - Innovation action Coordinator HELMHOLTZ-ZENTRUM HEREON GMBH Net EU contribution € 283 225,00 Address MAX PLANCK STRASSE 1 21502 Geesthacht Germany See on map Region Schleswig-Holstein Schleswig-Holstein Herzogtum Lauenburg Activity type Research Organisations Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 283 225,00 Participants (4) Sort alphabetically Sort by Net EU contribution Expand all Collapse all INSTITUT DE SOUDURE ASSOCIATION France Net EU contribution € 263 250,00 Address RUE DES VANESSES 90 ZI PARIS NORD 93420 VILLEPINTE See on map Region Ile-de-France Ile-de-France Seine-Saint-Denis Activity type Research Organisations Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 263 250,00 BELGISCH INSTITUUT VOOR LASTECHNIEK VZW Belgium Net EU contribution € 220 512,50 Address ANTOON VAN OSSLAAN 1 1120 Bruxelles / Brussel See on map Region Région de Bruxelles-Capitale/Brussels Hoofdstedelijk Gewest Région de Bruxelles-Capitale/ Brussels Hoofdstedelijk Gewest Arr. de Bruxelles-Capitale/Arr. Brussel-Hoofdstad Activity type Research Organisations Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 220 512,50 CHEMETALL GMBH Germany Net EU contribution € 66 062,50 Address TRAKEHNER STRASSE 3 60487 FRANKFURT AM MAIN See on map Region Hessen Darmstadt Frankfurt am Main, Kreisfreie Stadt Activity type Private for-profit entities (excluding Higher or Secondary Education Establishments) Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 94 375,00 TRA-C INDUSTRIE SAS France Net EU contribution € 120 837,50 Address ZAC LES OLMES 69490 LES OLMES See on map SME The organization defined itself as SME (small and medium-sized enterprise) at the time the Grant Agreement was signed. Yes Region Auvergne-Rhône-Alpes Rhône-Alpes Rhône Activity type Private for-profit entities (excluding Higher or Secondary Education Establishments) Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 172 625,00