By A Erman Tekkaya; Nooman Ben Khalifa
Read or Download 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 PDF
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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
Tetrahedron elements were used and remeshing was active. The numbers of elements changed from 8,000 at the beginning up to 18,000 at the end of the process. Mesh windows saved a constant element size in the forming zone. Fig. 5: a) Distribution of strain, b) Distribution of strain rate [1/s] The maximum effective strain rate was 10 per second, the effective strain was 5. s 5a and 6 show the distribution of strain after the extrusion process. The dead metal zone is identifiable. In the corner, both the strain and the strain rate (Fig 5) are zero.
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. 44 (1996) pp. 4463-4473. M. Sellars, Q. Zhu, “Microstructural modelling of aluminium thermomechanical processing”, Mater. Sci. , vol. A280 (2000) pp. 1-7. alloys during  E. Kozeschnik, J. Svoboda, P.
For the calculation of the precipitation parameters the program MatCalc was used . The precipitation kinetics was calculated during heat treatment of AA6082 at 540°C for 3h. The homogenised microstructure shows a relatively high volume fraction of large Al6(Mn,Fe) particles with a mean particle radius of 1-5 µm. e. volume fraction (fv) and mean radius (r), during extrusion were held constant after homogenization. The nucleation of the cube recrystallization is considered for multi-step deformation processes, for example rolling.
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