By A Erman Tekkaya; Nooman Ben Khalifa
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Extra info for Advances on hot extrusion and simulation of light alloys : selected, peer reviewed papers from the International Conference on Extrusion and Benchmark (ICEB), Dortmund 2009, Germany, September 16.-17. 2009
424 31 ucleation model. For the SRX nucleation the model according to Vatne  with three nucleation sites (particle stimulated nucleation, cubic sites and nucleation at grain boundaries) is applied in the following. Particle stimulated nucleation (PSN) is very important recrystallization mechanism of commercial aluminium alloys containing coarse particles (>1µm). The density of PSN nuclei becomes: 4 Lγ , exp − (7) PD − PZ where CPS is a constant and 0 as well as L are particle size distribution parameters.
Sheppard, “Nature of friction in extrusion process and its effect on material flow”, Materials Science and Technology, vol. 19 No. 5, (2003) pp. 837-846.  Schikorra M, Tekkaya A. ) vol. 1, (2008) pp. 1387-1393  F. Roters, D. Raabe, G. Gottstein, “Work hardening in heterogeneous Al-alloys – A microstructural approach based on three internal state variables”, Acta Materialia, vol. 48 (2000) pp. 4181-4189. E. Vatne, T. Furu, R. Orsund, E. Nes, “Modelling recrystallization after hot deformation of aluminium”, Acta Materialia, vol.
2 right) and main deformation zone (point 2 in Fig. 2 right) during the extrusion process simulation without considering friction in contact simulation. J. Humphreys and M. Hatherly: Recrystallization and Related Annealing Phenomena, ELSEVIER, Second Edition (2004).  C. M. Sellars and Q. Zhu: Microstructural modelling of aluminium alloys during thermomechanical processing, Materials Science and Engineering A, Vol. 280 (2000), pp. 1-7. 50 Advances on Hot Extrusion and Simulation of Light Alloys  P.
Advances on hot extrusion and simulation of light alloys : selected, peer reviewed papers from the International Conference on Extrusion and Benchmark (ICEB), Dortmund 2009, Germany, September 16.-17. 2009 by A Erman Tekkaya; Nooman Ben Khalifa