Validation of a fabrication procedure for bi-metallic aero engine components in superalloys
| Reference number | |
| Coordinator | GKN AEROSPACE SWEDEN AB |
| Funding from Vinnova | SEK 3 775 874 |
| Project duration | November 2017 - December 2019 |
| Status | Completed |
| Venture | National Aeronautical Research Program 7 |
| Call | 2017-02942-en |
Purpose and goal
The project has successfully accomplished all proposed goals. The planned PhD degree in Solid Mechanics was obtained. The modelling and simulation of the hot forming procedure of a double-curved component in alloy 718 and Haynes 282 was performed. Corresponding validation hot forming tests were successfully conducted. The involved Swedish SMEs have enhanced their knowledge and knowhow to produce desired sheet-metal components in commercially interesting superalloys for the aerospace industry.
Expected results and effects
The predicted springback after hot forming of alloy 718 is in good agreement with the experimental tests. Considering holding time and stress relaxation data in a hot forming simulation is key to accurately predict residual stresses and springback. A higher forming temperature is needed in Haynes 282 to achieve a similar amount of predicted springback over the part. The industry may benefit from the presented FE methodology to develop future manufacturing processes for lightweight designs.
Planned approach and implementation
The research activities and experimental and validation hot forming tests were performed in both alloy 718 and Haynes 282 according to the different work packages. The project activities have been successfully completed by combining advanced thermo-mechanical FE analyses together with the competences and equipment of the project partners. The use of stress relaxation data in the hot forming simulations predicted the final geometry of the desired component within tolerance for production for GKN.