T. Bajor, M. Krakowiak, P. Szota, Czestochowa University of Technology, Czestochowa, Poland The paper presents the results of numerical modelling of AZ61 magnesium alloy hot deformation using modified ECAE method. The temperature-velocity conditions were analysed using FEM. The extrusion process was realised using the die with modified angular channel containing horizontal contracting zone in t...

The numerical dimensioning of injection heads and tools for the extrusion of rubber profiles requires both, the experimental investigation and numerical consideration of the viscoelastic material behavior. Usage of finite element software allows drastic reduction of a time-consuming empiric adaptation process for the design of extrusion tools. In this context, viscoelasticity covers three diffe...

Rheological properties of intermediate moisture (35-45% wet basis) doughs from pregelatinized and raw wheat starch blends of various ratios were characterized using off-line capillary rheometry and online slit-die extrusion. In the case of capillary rheometer, viscosity of blends decreased by up to 50% as pregel starch concentration increased from 5 to 45%, whereas tests could not be conducted ...

Extrusion profiles are extensively used in industries and any improvement the process could potentially have a large impact on energy cost savings. In this study, novel extrusion method, namely multi-container extrusion, was proposed for producing thin-walled wide aluminium components with low force. Its basic principle is to enable multiple billets be welded forced through die orifice simultan...

Grain refinement improves the mechanical properties and formability of metals and alloys. So far, several different grain refinement methods have been proposed and studied. Severe plastic deformation is one of the most promising and efficient methods. Therefore, in the present study the possibility of imposing a two-step severe plastic deformation (Extrusion and Equal channel angular pressing) ...

Slab method of analysis has been used for solving metal forming problems for a long time. However it has been restricted to plane strain and axisymmetric problems due to limitations in its formulations. In this paper a new formulation has been proposed so that it could be applied to three dimensional problems in metal forming. A parametric slab has been considered in this analysis and the force...

The recycling of copper coil into finished products via sand casting with subsequent cold extrusion was investigated. This paper examined the effects on mechanical properties scrapped using a locally manufactured extruder conventional face die. tested extrudates are limited to hardness, tensile, and compressive strength. results reveal that hardness extruded 11.10 mm 11.45 improved significantl...