1 / 17

Modelling and Simulation of grain size evolution

Modelling and Simulation of grain size evolution. Institut of Metal Forming. Dr. rer. nat. Martin Franzke Innovationsforum Florianópolis 2008. Contents. Introduction Basics of MSI (MicroStructureSimulation) Industrial application (forging of a turbine disk).

kenley
Download Presentation

Modelling and Simulation of grain size evolution

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Modelling and Simulation ofgrain size evolution Institut of Metal Forming Dr. rer. nat. Martin Franzke Innovationsforum Florianópolis 2008

  2. Contents • Introduction • Basics of MSI (MicroStructureSimulation) • Industrial application (forging of a turbine disk)

  3. Microstructure evolution during forming Hardening Coarse initial Dynamic grain Recovery recrystallised Dynamic final grain Recrystallisation Roll gap Static Recrystallisation Static Recovery Forming texture

  4. 100µm sF 100µm smax sstat 100µm ecrit emax estat Flow stress and metallography

  5. IN 706 at 950°C and j = 10 s-1 dDRX = 12.9 µm 1 3 2 dDRX = 6.6 µm dDRX = 18.7 µm Dynamic recristallisedaverage grain size in mm StrucSim - Microstructure simulation during compression of Inconel706 LARSTRAN/Shape

  6. Forging of a turbine disk - Process design • Heating the cylindrical billet from 20oC up to 1040oC • Transport from the furnace to the press • Shaping the billet in an one step closed die forging process

  7. Forging of a turbine disk - Boundary conditions • Die velocity 20mm/s • Die temperature 650oC • Friction (Coulomb ) 0.25 • Heat transfer () 0.002 W(K*mm2) • Emission () 0.9 • Surrounding temperature 30oC • Time for closed die operation 8.7s

  8. Forging of a turbine disk - Heating 196 mm Heating time of 2000s is sufficient to reach the core temperature of 1040oC 100 mm

  9. Forging of a turbine disk - Transport (radiation)

  10. Forging of a turbine disk - Closed Die Operation

  11. Forging of a turbine disk - Closed Die Operation

  12. Forging of a turbine disk - Closed Die Operation Folding!

  13. Forging of a turbine disk - Closed Die Operation

  14. Forging of a turbine disk - Closed Die Operation

  15. Forging of a turbine disk - Closed Die Operation

  16. Validation

  17. Summary • Boundary conditions are still the weak point • Simulation of grain size evolution is already available for a number of materials • Computing time is not really the limiting factor

More Related