Abstract
The topic of the current work is an investigation of the microstructure of 6082 Aluminium alloy in artificial aged condition (T6 condition) before and after cold forging test. Aluminium is an essential choice when working on the lightening of metallic structures. Different levels of plastic strain have been applied to correlate the forging parameters with the microstructure changes. EBSD in combination with EDS analysis have been performed to well describe the microstructure properties. It was found that the local misorientation inside the grains increases with the nominal plastic strain. The formation of low angle grain boundaries (2∘ ) takes place both along initial grain boundaries (θ > 15∘ ) and within the original grains. This result is an indication of the local deformation of grains during cold forging.
Highlights
In automotive industry, looking for lightweight components is a central challenge
SEM micrograph in Figure 2 indicates that strong plastic deformation and surface layers abrasion take place in the deformed specimens
The indenter asperities press strongly the surface layers of Aluminium leading to plastic deformation and localized cracking
Summary
In automotive industry, looking for lightweight components is a central challenge. Due to economical and ecological reasons as well as to improve product properties, a mass reduction is necessary [1]. Getting mass reduction of the vehicles is closely related to the use of light materials such as Aluminium alloys. The 6082 alloy is well used in automotive components because of its weight reduction, its higher mechanical properties, its excellent corrosion resistance and its good weldability in comparison with other aluminium alloys [2]. That’s why before forming some annealing steps at high or moderate temperatures are required to improve the material ductility. Less work has been accomplished on the effect of the process on the microstructure changes. Microstructure changes induced by cold forming play a crucial role for mechanical failure and wear of contacting materials. The aim of the present work is to understand the effect of cold forging on the microstructure changes of the 6082 alloy by means of advanced analysis tool such as SEM-EBSD
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