Influencia do tempo de tnvelhecimento da liga Al-Mg-Si com relação as propriedades mecânicas

Abstract

Aluminum alloys have had more and more industrial applications, therefore, it is necessary to study their processing and chemical compositions to understand and improve their mechanical properties. This work aims to analyze the chemical composition of two Al-Mg-Si alloys and the effects that the heat treatments of solubilization and aging at different times have on their mechanical and microstructural characteristics, considering the effects of contaminants on their compositions. Vickers microhardness and tensile tests were performed to evaluate the mechanical properties of the materials in their initial condition. Subsequently, the materials were subjected to solubilization treatment at 530 °C for 40 minutes, followed by aging at 180 °C for 0.5, 1, 2, 4, 6, and 8 hours, with Vickers microhardness measurements taken for each aging period. Metallographic analyzes were performed on the initial materials conditions and after 0,5 and 6 hours of aging. The microhardness results were compared, enabling the construction of the aging curve of the materials and the observation of the influence of aging time and chemical composition on the mechanical properties of the alloy