Instituições de ensino: Universidade Estadual Paulista "Júlio de Mesquita Filho", Universidade Estadual Paulista - Faculdade de Engenharia de Ilha Solteira, Universidade Estadual Paulista "Júlio de Mesquita Filho", Universidade Estadual Paulista "Júlio de Mesquita Filho", Advanced Engenharia
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Strips made of aluminum alloy A413 were fabricated using the single roll continuous casting processing,
with pouring temperature of the cast alloy (1300g) of about 680 ºC on the cooling slope, producing a metallic slurry
that feeds the nozzle which is dragged by the roll at a rate of 0.2 m/s. Two conditions for the finishing of the roll
surface were tested: 1.) Coating of the surface with boron nitride (BN); and 2.) Finishing of the surface using 1200 grit
sandpaper. Further tests with the rolls surface finish obtained with a 1200 grit sandpaper were carried out: 1.)
without alloy additions; and 2.) with TiBAl as grain refiner. The microstructures were observed using an Optical
Microscope - OM and a Scanning Electron Microscope - SEM. The mechanical properties were obtained through
tensile testing. It was found a decrease on the strength of the strips by coating the roll with boron nitride. A relevant
increase in yield and tensile strength was measured on the specimen treated with TIBAL, along with a decrease on the
elongation at fracture. Effects of poisoning were not found, although reported in Al-Si alloys with more than 3wt% of
Silicon. More eutectic phase was formed by the addition of TIBAL. It suggests an action of the Ti and B on the coupled
zone of the Al-Si eutectic.
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