By R. Cheung, J. Klein, K. Tsubouchi, M. Murakami, N. Kobayashi
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Additional resources for Advanced Metallization and Interconnect Systems for Ulsi Applications in 1997
Macey and Salim (Ref 9) developed a two-dimensional computer model for the hot extrusion of aluminum based on a commercially available finite difference code (NOVA 20). They used the model to predict how the effects of extrusion speed, initial billet temperature, and static yield stress would affect the peak temperature and ram load generated in the extrusion. They also presented an example to demonstrate how the model can be used in the alternative plane-strain model to give an indication of behavior during extrusion under nonaxisymmetric conditions.
Fifth International Aluminum Extrusion Technology Seminar, Aluminum Association and Aluminum Extruders Council, 1992 11. Y. Tashiro, H. Yamasaki, and N. Ohneda, Extrusion Conditions and Metal Flow To Minimize Both Distortion and Variance of CrossSectional Shape, Proc. Fifth International Aluminum Extrusion Technology Seminar, Aluminum Association and Aluminum Extruders Council, 1992 12. I. W. Jowett, Temperature Distribution in Aluminum Extrusion Billets, Proc. Sixth International Aluminum Extrusion Technology Seminar, Vol 1, Aluminum Association and Aluminum Extruders Council, 1996 13.
Thermodynamics in Extrusion / 45 Fig. 11 Comparison of maximum temperature rise in the billet obtained from simulation and experiment in the billet with extrusion speed for fixed extrusion ratio on 6063 aluminum alloy Isothermal Extrusion As discussed in the previous sections, the exit temperature can vary during extrusion with a constant ram speed due to mechanics and thermodynamics of deformation processes. A temperature increase toward the beginning and the end of extrusion is observed for a given billet and container under different extrusion conditions, such as ram speed, die parameters, and alloy characteristics.