Caracterização da liga AA2024-T3: análise microestrutural, microdureza e resistência a corrosão

Abstract

Aluminum alloy AA2024, whose main added elements are copper, magnesium and manganese, is largely used by the aeronautical industry, where high mechanical resistance combined with high corrosivity resistance is highly demanded, these features can be found in these metal, together with a low density, and high electrical and thermical condutivity. Although, there is the possibility of changing these properties with heat treatments. Aiming to increase microhardness and corrosion resistance, two heat treatments were carried out, using the reageing method. By carrying out this procedure, diferent results than expected were obteined, with a reduction in the microhardness of the alloy together with a bigger loss of mass when exposed to a more corrosive environment, in addition to prolonging the treatment negatively affecting these properties, proved to be ineficiente in relation to the initially desire objectives.