Per: ALICIA REGINA ZANON BARBOSA (UNIVERSIDADE FEDERAL DO PARá), Yan Christian Silva de Araújo (UNIVERSIDADE FEDERAL DO PARá), Eric Elian Lima Espíndola (UNIVERSIDADE FEDERAL DO PARá), Luane Luiza Pereira Marques (UNIVERSIDADE FEDERAL DO PARá), Maria Adrina Paixão de Souza da Silva (UNIVERSIDADE FEDERAL DO PARá), Amanda Lucena de Medeiros (UNIVERSIDADE FEDERAL DO PARá), Deibson Silva da Costa (UNIVERSIDADE FEDERAL DO PARá)
Abstract:
With the expansion of transmission (Tx) and distribution (Dx) networks for electrical energy due to urban development and the constant growth of the industrial sector, it becomes necessary to enable low-cost materials that provide good properties for the manufacturing of Tx and Dx cables. Therefore, this study aimed to analyze the macrostructure and the electrical and mechanical properties of the Al-0,5%Si alloy, as well as the influence of adding 0,3% nickel (Ni) and annealing heat treatment. Metallography, electrical resistance, and tensile tests were conducted to obtain the results, which were subsequently analyzed and compared. The results showed that Ni caused elongation in the crystal structure, while annealing altered the grain orientation. Electrical conductivity showed a small increase from 61% to 61,23% IACS in untreated alloys, while annealing raised the property to 67,99% IACS. Tensile strength results evidenced an increase from 185 to 254,25 MPa with the addition of Ni, but after annealing, there was a decrease to 93,30 MPa. Therefore, it was found that the addition of Ni modified the structure and significantly affected the material's strength, and annealing contributed to the enhancement of electrical conductivity.