2026-02-132026-02-132026-01-23ARAÚJO, Yan Christian Silva de. Desenvolvimento de ligas de sistema Al-Ni para condutores elétricos: caracterização da liga 1350 modificada com teores de 1%, 2%, 3% e 4% de níquel. Orientador: Deibson Silva da Costa. 2026. 65 f. Trabalho de Curso (Bacharelado em Engenharia de Materiais) – Faculdade de Engenharia de Materiais, Campus Universitário de Ananindeua, Universidade Federal do Pará, Ananindeua, 2026. Disponível em:https://bdm.ufpa.br/handle/prefix/9212. Acesso em: .https://bdm.ufpa.br/handle/prefix/9212The continuous growth in global demand for electrical energy imposes the challenge of developing overhead conductors that combine high energy efficiency and mechanical reliability. Aluminum alloy 1350, although the standard for electrical conductivity, presents limitations in tensile strength, while precipitation-hardened alloys, such as 6201, penalize current carrying capacity. In this context, this study investigated the development and characterization of Al-Ni system alloys with nickel contents of 1%, 2%, 3%, and 4% by weight. The alloys were manufactured via direct casting in a U-shaped metallic mold and cold-rolled, aiming to achieve an optimized balance of properties through dispersion strengthening and matrix purification (scavenging effect) mechanisms. The methodology included macrostructural characterization, electrical resistivity tests, uniaxial tensile testing, chemical analysis by optical emission spectrometry, and fractography via Scanning Electron Microscopy (SEM). Results demonstrated that the addition of nickel promoted grain refinement, shifting the macrostructure from columnar to equiaxed. The 2% Ni alloy stood out as the optimal composition, reaching an Ultimate Tensile Strength (UTS) of 264.70 MPa — an absolute increase of 132.29 MPa (99.9%) compared to the 1350 alloy — while maintaining an electrical conductivity of approximately 65.28% IACS. Fractographic analysis confirmed a ductile behavior for this composition, characterized by the presence of equiaxed dimples nucleated by Al3Ni particles. On the other hand, the 4% Ni alloy exhibited brittle behavior and matrix saturation, making its processing unfeasible. It is concluded that the Al-2%Ni alloy represents the optimal composition, proving to be competitive with commercially available overhead conductors.Acesso AbertoCondutores aéreosCondutividade elétricaAl-NiLiga 1350Overhead conductorsElectrical conductivity1350 alloyCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::METALURGIA DE TRANSFORMACAO::TRATAMENTO TERMICOS, MECANICOS E QUIMICOSTrabalho de Curso - Graduação - MonografiaAttribution-NonCommercial-NoDerivs 3.0 Brazil