2026-02-032026-02-032025-12-19ARAUJO, Juliana da Mascena. Estudo comparativo das ligas de al-2%si obtidas pelos métodos tradicional e pó de silício, tratadas termicamente e analisadas por ensaios elétricos e mecânicos. Orientador: Deibson Silva da Costa. 2026. 62 f. Trabalho de Curso (Bacharelado em Engenharia de Materiais) – Faculdade de Engenharia de Materiais, Campus Universitário de Ananindeua, Universidade Federal do Pará, Ananindeua, 2025. Disponível em: https://bdm.ufpa.br/handle/prefix/9148. Acesso em:.https://bdm.ufpa.br/handle/prefix/9148Aluminum is an extremely versatile material that is widely used in everyday life, but on its own it does not have sufficient strength for most applications. For this reason, it is necessary to add alloying elements to improve or introduce specific properties: hardness, tensile strength, ductility, among others. Aluminum alloys are versatile and widely used in industry. Among the Al alloys, the aluminum-silicon alloy stands out, which in turn is widely used in the automotive and aeronautical sectors and represents more than 50% of industrial applications. In this sense, the objective of this study was to evaluate, through metallographic analyses and mechanical tests, the influence of silicon particle size when inserted as an alloying element in aluminum. The silicon content used was 2%, and the methods evaluated were: handling the silicon in small pieces and applying the silicon in powder form, with a particle size of 200 mesh. In addition to the difference in the sizes of the alloying element, the way in which they were added to the main metal (aluminum) was also different. In the first method, called the Traditional Method (TM), all the alloy constituents were melted together and then cast. In the second method, Silicon Powder Addition Method (MAPS), the aluminum was melted and then the sieved silicon was added, homogenized, and poured into the mold. After the alloys were manufactured, macrostructural analyses, electrical resistance, microhardness, and tensile strength tests were performed with and without heat treatment. The alloy obtained with MT (without heat treatment), compared to the others, presented a macrograph with more refined grains and a hardness of 48.52 HV. For the MAPS alloys (without heat treatment), the tensile strength limit results were 228.74 MPa and the deformation percentage was approximately 5%. As for the treated (annealed) alloys, MAPS showed higher electrical conductivity (67.38% IACS) and a reduction in tensile strength (185.36 MPa). The results according to the methods studied did not show discrepant values, except for the alloys that underwent heat treatment, suggesting that any method used would be relevant, depending on the application of the alloy.Acesso AbertoAlumínioSilícioEnsaiosTratamento térmicoAluminumSiliconTestsHeat treatmentCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS::EXTRACAO E TRANSFORMACAO DE MATERIAISTrabalho de Curso - Graduação - MonografiaAttribution-NonCommercial-NoDerivs 3.0 Brazil