Modeling Friction in HyperXtrude for Hot Forward Extrusion Simulation of EN AW 6060 and EN AW 6082 Alloys

Abstract:

In this work, different friction models available in HyperXtrude had been investigated in the context of hot forward extrusion simulation of aluminum alloys. Extrusion trials were carried out for EN AW 6060 and EN AW 6082 at different temperatures and ram speeds. The extrusion forces as well as material temperatures near the exit of the die were recorded and used for the validation of the simulations. FE-simulations of each extrusion trial were carried out in HyperXtrude. Initially, friction models were calibrated for only two extrusion trials. Then, these calibrated friction models were used to simulate the extrusion trials with different process parameters. Reasonably good agreements were observed between experiments and simulations in terms of extrusion forces. However, the simulations overpredicted the material temperature by almost up to 40 °C for extrusion trials with high ram speed.

• Periodical: Key Engineering Materials (Volume 926)
• Pages: 416-425
• DOI: https://doi.org/10.4028/p-qfc820
• Online since: July 2022
• Authors: Sheikh Enamul Hoque*, Sindre Hovden, Stefan Culic, Jürgen A. Nietsch, Johannes Kronsteiner, Dieter Horwatitsch
• Keywords: Aluminum Extrusion, Friction Modeling, HyperXtrude

References

[1] P. Hora, C. Karadogan, L. Tong, Numerische Modellierung thermischer und tribologischer Randbedingungen, in: Conference Proceedings Extrusion Zurich (2005).

[2] C. Karadogan, F. Vanini, L. Tong, P. Hora, State of the Art and Potential Development of Digital Extrusion Modeling, in: Light Metal Age 63 (2005), 40-43.

[3] H. S. Valberg, Applied Metal Forming including FEM Analysis, first edition, Cambridge University Press, Cambridge, (2010).

[4] T. Wanheim, N. Bay, A model for friction in metal forming processes, in: Ann. CIRP 27 (1976) 189–193.

[5] P. Hora, C. Becker, L. Tong, J. Maier, S. Müller, Advanced frictional models for extrusion application, in: Key Engineering Materials 585 (2013) 41-48.

DOI: 10.4028/www.scientific.net/kem.585.41

[6] L. Tong, FE Simulation of Bulk Forming Processes with a Mixed Eulerian-Lagrangian Formulation, PhD Thesis, ETH-Zurich (1995).

[7] C. Karadogan, Advanced methods in numerical modeling of extrusion processes, PhD Thesis, ETH-Zurich (2005).

[8] L. Wang, Modelling of friction for high temperature extrusion of aluminium alloys, PhD Thesis, TU Delft (2012).

[9] D. Horwatitsch, Entwicklung eines Reibmodells für hohe Temperaturen und hohe Umformgrade (Development of a Friction Model for High Temperatures and High Strains), In: Steinhoff, K. (ed.): Berichte zur Metallformgebung – vol 3. Kassel: Kassel university press, (2013).

[10] M. G. L. Crosio, Virtual analysis of welds formation during direct extrusion processes, PhD Thesis, ETH-Zurich (2020).

[11] C. Bertoli, Optimization of Hybrid Extrusion Dies with Internal Cooling Channels, PhD Thesis, ETH-Zurich (2020).

[12] M. Negozio, R. Pelaccia, L. Donati, B. Reggiani, L. Tomesani, T. Pinter, FEM Validation of Front End and Back End Defects Evolution in AA6063 and AA6082 aluminum alloys profiles, in: Procedia Manufacturing 47 (2020) 202–208.

DOI: 10.1016/j.promfg.2020.04.178

[13] B. Reggiani, A. Segatori, L. Donati, L. Tomesani, Prediction of charge welds in hollow profiles extrusion by FEM simulations and experimental validation, in: The International Journal of Advanced Manufacturing Technology 69 (2013) 5-8.

DOI: 10.1007/s00170-013-5143-2

[14] T. Sheppard, EXTRUSION OF ALUMINIUM ALLOYS, first edition, Springer Science + Business Media, Dordrecht (1999).

[15] L. Donati, L. Tomesani, M. Schikorra, N. Ben Khalifa, A.E. Tekkaya, Friction model selection in FEM simulations of aluminium extrusion, in: Int. J. Surface Science and Engineering 4 (2010) 27-41.

DOI: 10.1504/ijsurfse.2010.029627

[16] W. Z. Misiolek, R. M. Kelly, Extrusion of aluminium alloys, ASM Handbook, 2005, pp.522-527.

[17] E. Doege, H. M. Nolkemper, I. Saeed, Fließkurvenatlas metallischer Werkstoffe, Hanser Verlag München Wien (1986).

[18] Altair HyperXtrude Manual.