Efeitos do tratamento térmico de recozimento a diferentes temperaturas e tempos de tratamento em uma junta soldada da liga de alumínio 5052

Abstract

The present work is destined to study the influence of annealing thermal treatment in a naval aluminum (AA5052) welded joint aiming to reach possible improvements in the welding process of this alloy. For the welding process generates a large concentration of residuals tensions distributed at weld and heat-affected zones (HAZ).These tensions may negatively affect the joint performance. Thus, the annealing thermal treatment for stress relief will be performed in the samples at different times and temperatures in order to study its influence in the joint at diferent conditions. The methalography and microhardness test will be performed in the samples. Besides, the aluminum’s use in the naval industry has increased in a large proportion regionally, nationally and internationally. Therefore, it is essential to conduct researches and studies about this alloy in its most varied segments due to the possibility of enhancements through new implementations in the production process, which will certainly ensure a better quality at welding service and new technologies development. The results were satisfactory in terms of the influence of the heat treatment, in which the samples had different microstructures and a positive effect in the hardness in some specific conditions and in specific areas. We also emphasize that the plate used as aluminum 5052 presented a significant disagreement in its chemical composition in relation to the normative values being more coincident with the aluminum 5183 alloy, so it is necessary to consider this issue.