Academic Journal
Stabilization of the open-die forging process of TiAl alloys by using a close-loop control in the finite element simulation in case of unexpected disturbances
| Title: | Stabilization of the open-die forging process of TiAl alloys by using a close-loop control in the finite element simulation in case of unexpected disturbances |
|---|---|
| Authors: | Feistle, Martin, Ali, Syed, Linder, Christian, Thein, Ferdinand, Bambach, Markus, Herty, Michael |
| Publication Year: | 2025 |
| Collection: | Publikationsdatenbank der Fraunhofer-Gesellschaft |
| Subject Terms: | casting |
| Description: | High-strength Titanium Aluminide (TiAl) alloys hold great potential for future applications in lightweight turbine blades. Their success depends on reliably achieving a consistent transformation from the initial cast microstructure to a globular target microstructure throughout all critical areas of the blade. The exclusive use of a multi-stage closed-die forging process means that TiAl alloys cannot be reliably formed into turbine blades. The process chain must therefore be extended by a multi-stroke open-die forging process in order to integrate further degrees of freedom into the process. During the open-die forging of TiAl alloys, however, unexpected process disturbances often occur, e.g. in the form of a fluctuation in temperature or forming speed, which has an unwanted effect on the microstructure. For the simulations within the present work, a finite element model of the considered process is included, which is extended by a corresponding material model to describe the globularization state of the material and a closedloop control. The exponentially damping controller developed in the research project is intended to regulate disturbance variables as quickly as possible to achieve a minimum deviation from the target microstructure state. The function of the controller is simulatively tested, discussed and evaluated as part of the work. ; 3104 |
| Document Type: | article in journal/newspaper |
| File Description: | application/pdf |
| Language: | English |
| Relation: | International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes 2025; Journal of physics. Conference series; #PLACEHOLDER_PARENT_METADATA_VALUE#; https://publica.fraunhofer.de/handle/publica/496363 |
| DOI: | 10.1088/1742-6596/3104/1/012104 |
| Availability: | https://publica.fraunhofer.de/handle/publica/496363 https://doi.org/10.1088/1742-6596/3104/1/012104 |
| Rights: | CC BY 4.0 |
| Accession Number: | edsbas.184367AA |
| Database: | BASE |
| DOI: | 10.1088/1742-6596/3104/1/012104 |
|---|