Finite Element Modeling of Shear Strain in Rolling with Velocity Asymmetry in Multi-Roll Calibers

Abstract:

Severe plastic deformation is now recognized the most efficient way of producing ultrafine grained metals and alloys. At the present time a lot of severe plastic deformation methods have been proposed and developed. They differ in the deformation schemes. Unlike such severe plastic deformation methods as high pressure torsion and equal-channel angular pressing, rolling with the velocity asymmetry is a continuous process. It helps to solve the problem of the limited length of manufactured bars with semi ultrafine structure. Rolling process with roll velocity asymmetry generates high shear strain necessary for obtaining ultrafine structures of the processed material. A new process of asymmetric rolling of profiles in multi-roll passes has been developed. This process can be used for production of high-strength profiles such as circles, hexagons, wire rods, etc. Compression of the bar in multi-roll passes can be done not only from two, as usual, but from three or four sides. In case of a multi-crimped bar, a uniform compression scheme with large hydrostatic pressure is created in the deformation zone. It enhances the ductility of the material and allows increasing the strain intensity. Simulation in DEFORM 3D^TM proved that the process of asymmetric rolling in multi-roll calibers allows to obtain higher values of shear strain and strain effective.

• Periodical: Key Engineering Materials (Volumes 622-623)
• Pages: 912-918
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.622-623.912
• Online since: September 2014
• Authors: Alexander Pesin*, Mikhail Chukin, Alexey Korchunov, D.O. Pustovoytov
• Keywords: Asymmetric Rolling, Effective Strain, FEM, Multi-Roll Caliber, Shear Strain

References

[1] Y.H. Ji, J.J. Park. Development of severe plastic deformation by various asymmetric rolling processes / Materials Science and Engineering: A, Vol. 499, Issues 1-2, 2009, P. 14-17.

DOI: 10.1016/j.msea.2007.11.099

[2] Pesin А.М. Modeling and development of the processes of asymmetric deformation to improve sheet rolling: thesis. Magnitogorsk, 2003. 395 p.

[3] Li Y.H., Park J.J., Kim W.J. Finite element analysis of severe deformation in Mg–3Al–1Zn sheets through differential-speed rolling with a high speed ratio. Mater. Sci. Eng. Vol. A, 2007. P. 454-455.

DOI: 10.1016/j.msea.2006.11.076

[4] Pesin A.M., Salganik V.M., Pustovoitov D. O, Dyja H. Asymmetric rolling: Theory and Technology / Hutnik. 2012. No 5. P. 358-363.

[5] Zhiming Li, Liming Fu, Bin Fu, Aidang Shan. Effects of annealing on microstructure and mechanical properties of nano-grained titanium produced by combination of asymmetric and symmetric rolling / Materials Science and Engineering: A, Vol. 558, 2012, P. 309-318.

DOI: 10.1016/j.msea.2012.08.005

[6] Sverdlik M., Pesin A., Pustovoytov D. Theoretical basis and technology development of the combined process of asymmetric rolling and plastic bending / Advanced Materials Research. 2012. Т. 586. С. 259-264.

DOI: 10.4028/www.scientific.net/amr.586.259

[7] Pesin A.M. Scientific school of asymmetric rolling in Magnitogorsk / Vestnik NMSTU. 2013. No5 (45). С. 23-28.

[8] Pesin A., Salganik V., Trahtengertz E., Drigun E. Development of the asymmetric rolling theory and technology / Proceedings of the 8-th International Conference on Metal Forming. Krakow / Poland / 3-7 September 2000. Metal Forming 2000. P. 311-314.

[9] Dyja H., Salganik W.M., Piesin A.M., Kawalek A. Asymetryczne walcowanie blach cienkich: teoria, technologia I nowe rozwiazania. Seria monografie, nr 137. – Czestochowa: 2008, 345 p.

[10] Sverdlik M., Pesin A., Pustovoytov D., Perekhozhikh A. Numerical research of shear strain in an extreme case of asymmetric rolling / Advanced Materials Research. 2013. V. 742. P. 476-481.

DOI: 10.4028/www.scientific.net/amr.742.476