2024-11-192024-11-192024-11-01SOUSA, Erick Roberth Sousa e. Efeito dos parâmetros da técnica de switchback sobre a geometria de soldas GMAW depositadas com arame AWS ER 70S-6. Orientador: Douglas Neves Garcia. 2024. 15 f. Trabalho de Curso (Bacharelado em Engenharia Mecânica) – Faculdade de Engenharia Mecânica, Campus Universitário de Tucuruí, Universidade Federal do Pará, Tucuruí, 2024. Disponível em: https://bdm.ufpa.br/jspui/handle/prefix/7445. Acesso em:https://bdm.ufpa.br/jspui/handle/prefix/7445This study investigates the effect of switchback parameters on the geometry of welds produced using the GMAW process with AWS ER70S-6 wire. Weld beads fabricated with varying torch advance and reverse lengths were analyzed. The switchback technique significantly influenced the bead geometry, increasing heat distribution and causing raised areas at the reversal points. Analysis of current and voltage oscillograms revealed arc instability, especially at higher welding speeds, leading to defects like "humping." The welds' microstructure showed grain recrystallization in the fusion zone, confirming the thermal effect of the technique. The results suggest that, while the switchback technique is promising for improving heat distribution and bead geometry, precise control of welding parameters is necessary to avoid weld defects.Acesso AbertoEstabilidade do arco elétricoQualidade superficial da soldaRefino de grãosArc stabilityWeld surface qualityGrain refinementCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::METALURGIA DE TRANSFORMACAO::SOLDAGEMTrabalho de Curso - Graduação - Artigo