Abstract
Abstract The properties of aluminum alloys can be improved by the processing conditions that cause changes in the microstructure and by the addition of alloy elements. In order to understand the physical behavior and mechanical properties of aluminum alloys, it is important to be aware of some of the microstructural characteristics. Some of these characteristics are the morphology, alloy elements, volume and size, and second phase. In this study, we analyzed the effect of annealing on the mechanical and microstructural properties of the laminated AA 5182 aluminum alloy, when subjected to different annealing conditions. The alloy was heated to temperatures of 50o C, 100o C, 150o C, 200o C, 250o C and 300o C for 10 minutes and left to cool naturally. The evolution of the microstructure was characterized by optical and electronic microscopy with EDS, and, to obtain the mechanical properties, a tensile test was performed and the fractures were subsequently analyzed. The results showed that the heat treatment used reduced the amount of second phase particles and this influenced the mechanical properties.
Highlights
Aluminum alloys are widely used in the areas of packaging, electronic technology, automotive body structure, engines and wheels, and wind and solar power generation, among others, due to advantages such as high specific strength, high processability, corrosion resistance[1], high conductivity, and ease of recycling[2]
The effect of annealing on the mechanical and microstructural properties of AA 5182 aluminum alloy was investigated and the following conclusions were obtained:. Using optical spectroscopy, it was observed in the studied samples that the chemical composition of magnesium presented below 14%, which is the standard for this type of alloy
Between the temperatures of 200 and 250 oC, there was an inversion of the values of the related mechanical properties, limit of resistance and elongation, elastic modulus and yield stress, load and rupture time
Summary
Aluminum alloys are widely used in the areas of packaging, electronic technology, automotive body structure, engines and wheels, and wind and solar power generation, among others, due to advantages such as high specific strength, high processability, corrosion resistance[1], high conductivity, and ease of recycling[2]. Mg and dispersion hardening by Mn and other alloying elements in the formation of dispersoids[4,5] Another type of increase in mechanical strength of this aluminum series is due to plastic deformation which affectsthe grain size[6], displacement density[7] and texture developed during the deformation process[8]. In the search for better performance of products obtained from AA 5182 aluminum, several studies have sought to understand the microstructural and mechanical changes of this alloy when subjected to the annealing process. This study shows the changes that occurred in the microstructure and mechanical properties of AA5182 aluminum alloy sheets after annealing with temperatures of 50 °C, 100 °C, 150 °C, 200 °C, 250 °C and 300 °C for 10 minutes. Details of the behavior of the sheet fractures that were obtained by the tensile test were shown by electron microscopy (SEM-EDS)
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