Numerically enhanced optimization of bi-material rod and tube extrusion
Paweł Kazanowski, Wojciech Misiołek, Mario E. Epler, Vinod K. Sikka
1Institute for Melal Forming, Lehigh University, 5 East Packer Aveniue, Bethlehem, PA, USA. 2Oak Ridge National laboratory, One Bethel Valley Road, 508, Oak Ridge, TN 37831, USA.
DOI:
https://doi.org/10.7494/cmms.2003.3.0043
Abstract:
The presented research results are an outcome of ongoing studies on optimization of the bi-material extrusion process. The initial billet geometry was optimized with a special focus on the ratio of the inner to the outer material thickness within the extrusion billet in order to control metal flow. The physical and numerical modeling techniques supported by a theoretical analysis have been implemented in the presented study. The visioplasticity technique was used for physical modeling and the numerical modeling was performed with the Finite Element Method DEFORM package. Obtained experimental results confirmed the influence of the initial bi-material billet geometry on the geometrical stability of the extrudate cross-section. A complex interface microstructures between two aluminum alloys as well as between plain carbon steel and stainless steel extruded simultaneously have been observed using light optical microscopy. The proposed material and process modifications resulted in improved yield.
Cite as:
Kazanowski, P., Misiołek, W., Epler, M., Sikka, V. (2003). Numerically enhanced optimization of bi-material rod and tube extrusion. Computer Methods in Materials Science, 3(3-4), 138 – 151. https://doi.org/10.7494/cmms.2003.3.0043
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