Characterization of dissimilar friction stir welded lap joints of AA5083 and GL D36 steel

Autor(es)

Batistao, Bruna Fernanda ^[1] ; Bergmann, Luciano Andrei ^[2] ; Gargarella, Piter ^{[1, 3]} ; de Alcantara, Nelson Guedes ^{[1, 3]} ; dos Santos, Jorge F. ^[2] ; Klusemann, Benjamin ^{[2, 4]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, Rodovia Washington Luiz, Km 235 SP-310, BR-13565905 Sao Carlos, SP - Brazil

^[2] Helmholtz Zentrum Geesthacht HZG, Inst Mat Res Mat Mech Solid State Joining Proc, Max Planck Str 1, D-21502 Geesthacht - Germany

^[3] Univ Fed Sao Carlos, Dept Mat Engn, Km 235 SP-310, BR-13565905 Sao Carlos, SP - Brazil

^[4] Leuphana Univ Luneburg, Inst Prod & Proc Innovat, Univ Sallee 1, Luneburg - Germany

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T; v. 9, n. 6, p. 15132-15142, NOV-DEC 2020.
• Citações Web of Science: 0

Resumo

Dissimilar AA5083 to GL D36 steel welds produced by Friction Stir Welding in lap joint configuration, with the aluminum plate placed on the advancing side, are studied regarding their mechanical, microstructural and interfacial properties for varying process parameters, i.e. welding and tool rotational speed. An increase of welding speed or decrease of the rotational speed causes the formation of tunnel defects, a decrease of the steel hook height and reduction of grain size in the aluminum stir zone. The maximum hardness is observed at the weld interface, due to the presence of intermetallic compound layers, identified as the Fe-rich phases as FeAl and Fe3Al. As the rotational speed increases, an increase of the IMCs thickness in the weld interface is found, which contributes to the degradation of the lap shear strength, due to the brittleness and high hardness of these phases. Overall, the maximum lap shear strength is obtained for welds showing macro (steel hook) and micro interlocks, as well as the formation of thin IMC layers at the weld interface. (C) 2020 The Authors. Published by Elsevier B.V. (AU)

• Processo FAPESP: 19/04613-3 - Estudo das propriedades mecânicas e microestruturais de juntas dissimilares de AA5083-O/H111 e aço naval GL D36 soldadas pela técnica de FSW
• Beneficiário: Bruna Fernanda Batistão
• Modalidade de apoio: Bolsas no Brasil - Mestrado