Journal
ADVANCED ENGINEERING MATERIALS
Volume 23, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adem.202100014
Keywords
finite-element modeling; linear flow splitting; severe plastic deformation
Categories
Funding
- German Research Foundation (DFG)
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The study investigates the deformation behavior and evolution of strain distributions of flat metal sheets in the high-strain forming process of linear flow splitting (LFS) using experimental and numerical techniques. A new tracer gradient method for mapping material flow based on diffusional concentration gradients is proposed. The research shows that friction between rolls and sheet is a critical parameter in the modeling of the LFS process.
The deformation behavior and evolution of strain distributions of flat metal sheets subjected to the high-strain forming process of linear flow splitting (LFS) are studied using experimental and numerical techniques. The new tracer gradient method for the mapping of material flow based on diffusional concentration gradients is proposed. The method is validated using theoretical predictions for rolling of a sheet and shown to overcome the limitations of previous techniques. A parametric finite-element model for LFS of a HC800LA grade steel is developed and validated against the results of the tracer gradient method. A sensitivity study is undertaken to investigate the effects of strain-hardening behavior and sheet thicknesses on the LFS process. A good agreement between experimental and numerical results is obtained, with the friction between rolls and sheet found to be a critical parameter in the modeling of the process. It is further observed that the formation of the characteristic steady state in the LFS process is linked to the material-hardening behavior and not the geometry of the sheet.
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