Dissimilar Metals LaserWelding between DP1000 Steel and Aluminum Alloy 1050

• Autor(a) principal: Marques, Pedro Carmona
• Data de Publicação: 2019
• Outros Autores: Pereira, António, Cabrinha, Ana, Rocha, Fábio, Fernandes, Fábio A. O., Sousa, Ricardo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10437/9706
• topic: STEEL; ALUMINUM; ELECTROTECHNICAL ENGINEERING; MECHANIC ENGINEERING; WELDING; LASER; WELDING PROCESSES; ALUMINUM ALLOY; LASER; ENGENHARIA ELETROTÉCNICA; ENGENHARIA MECÂNICA; SOLDADURA; AÇO; ALUMÍNIO; PROCESSOS DE SOLDADURA; LIGAS DE ALUMÍNIO

The welding of dissimilar metals was carried out using a pulsed Nd: YAG laser to join DP1000 steel and an aluminum alloy 1050 H111. Two sheets of each metal, with 30 14 1 mm3, were lap welded, since butt welding proved to be nearly impossible due to the huge thermal conductivity differences and melting temperature differences of these materials. The aim of this research was to find the optimal laser welding parameters based on the mechanical and microstructure investigations. Thus, the welded samples were then subjected to tensile testing to evaluate the quality of the joining operation. The best set of welding parameters was replicated, and the welding joint obtained using these proper parameters was carefully analyzed using optical and scanning electron microscopes. Despite the predicted difficulties of welding two distinct metals, good quality welded joints were achieved. Additionally, some samples performed satisfactorily well in the mechanical tests, reaching tensile strengths close to the original 1050 aluminum alloy.