Abstract
The effect of plastic deformation upon the grain structure and mechanical properties of Al-Cu-Mg-Mn alloy tubes under upsetting was investigated. It was found that plastic deformation techniques such as cold upsetting can overcome the disadvantages of the cutting process, such as the anisotropy of the original material, no grain structure, and not high mechanical properties, while also improving the mechanical properties of the product in local plastic deformation zones by changing the grain and fiber structure of the material. This article presents the results of our research and evaluates the increase of material durability in the tubes’ deformation zones compared with the initial state. In this study Al-Cu-Mg-Mn alloy material had been cutting with turn machine and plastic deformation by upsetting. Microstructures and hardness variations of cut surfaces that are obtained with different processes have been investigated.
Highlights
Aluminum alloy is a light-weight, corrosion-resistant metal with a good load capacity; its strength is insufficient for many applications in engineering and equipment operating under high mechanical loads
Plastic deformation is often applied to increase the mechanical properties of a solid material [10,11,12,13,14]
The major disadvantage of cutting methods is the low coefficient of the using material, especially when the part has a variable cross section and diameter [20]
Summary
Aluminum alloy is a light-weight, corrosion-resistant metal with a good load capacity; its strength is insufficient for many applications in engineering and equipment operating under high mechanical loads. This saves materials because, during the formation process, the tube thickness will be distributed according to the structure of the workpiece This method will save time, reduce the cost of the machining process, and improve the part’s mechanical properties because the deformation process will create the necessary grain direction, avoiding stress concentration at the position where the cross section changes [1]. To improve the mechanical properties to ensure that the part meets the requirements, the pressure machining method has been used This tubular part is made by cutting from a Ф75 × Ф40 × 190 mm tubular billet with a material efficiency reaching 31.58% a very low efficiency that wastes materials and pushes up production costs. Eight tasks are used to fabricate the part, namely, cutting, rough turning, face trimming, inner rough turning, inner cylindrical turning, thread turning, outer-surface
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