Abstract
The quality of extrusion welding in the extruded hollow shapes is influenced significantly by the pressure and effective stress under which the material is being joined inside the welding chamber. However, extrusion welding was not accounted for in the past by the developers of finite element software packages. In this study, the strength of hollow extrusion profile with seam weld produced at different ram speeds was investigated experimentally and numerically. The experiments were performed on an extruded hollow aluminum profile which was suitable to obtain the tensile tests specimens from its seam weld’s region at both parallel to extrusion direction and perpendicular to extrusion direction. A new numerical modeling approach, which was recently proposed in literature, was used for numerical analyses of the study. The simulation results performed at different ram speeds were compared with the experimental results, and a good agreement was obtained.
Highlights
The extrusion process is a viable metal forming process that can provide the desired shapes of products that have high strength-to-weight ratios and good dimensional accuracy [1,2,3]
In the hot extrusion process, the billet material is divided into metal streams by a porthole die, and these metal streams flow around the core supports that hold the stationary mandrel, and they are joined under pressure within the welding chamber [4]
The strengths of specimens parallel to extrusion direction were higher than the strengths of specimens prepared perpendicular to extrusion direction because the first deformed region in the tensile specimen under tension load is the middle of the specimen where seam weld located
Summary
The extrusion process is a viable metal forming process that can provide the desired shapes of products that have high strength-to-weight ratios and good dimensional accuracy [1,2,3]. Extrusion welding takes place in hollow profiles made of lightweight alloys for many industrial applications using. Materials 2015, 8 a porthole die or a die with a mandrel. In the hot extrusion process, the billet material is divided into metal streams by a porthole die, and these metal streams flow around the core supports that hold the stationary mandrel, and they are joined under pressure within the welding chamber [4]. Extrusion welding takes place when the required pressure value for a given temperature is applied within the welding chamber. Chen et al [5]
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