Caracterízação mecânica da liga de alumínio AA 3104 H19 utilizada na fabricação de recipientes para bebidas

Abstract

In this work the mechanical characteristics and phases present in the alloy AA 3104 H19, used in the manufacture of containers (cans) for beverages by means of mechanical forming process were analyzed. Samples of some coils were collected on the factory floor for the production of 12Oz (355ml) beverage containers. Each coil had an average length of 9 300 m and a width of 1676,7 mm and a thickness of 0,268 mm, where parts of the beginning, center and end of the coil were taken, which in turn were subdivided into three parts: left, part central and right sides in the crystallographic directions of 0º, 45º and 90º in relation to the direction of lamination. This allowed the verification of the uniformity of the mechanical characteristics and the microconstituents of the alloy under analysis. The results obtained by traction, microhardness, X-ray analysis (DR-X) and Fluorescence analysis (FRX), allowed the identification of characteristics such as stretching, traction resistance limit, outflow limit, microhardness, phases present in the material and chemical composition of the alloy under study. The traction limit resistance and outflow limit are in accordance as specified by the manufacturer, since the maximum displacement of the deformation or stretching, presented a variation tending to smaller values than the specified. The microhardness analyzes revealed values close to the reference values in the literature, the analyzes of DR-X revealed the present phases and the orientation of the crystalline planes of each phase through the Miller indexes and the analyzes of FRX, although with some values different from those quoted by the manufacturer and the absence of zinc, served to prove the chemical elements present and to assist in the qualitative analysis via DR-X