Determination of Tensile Shear Strength and Corrosion Behavior of Circular Bead Produced by a Laser Beam for Overlapped AISI 304 Steel Sheets

Autor(es)

Deisi Vieira ^[1] ; Jose Eduardo May ^[2] ; Graziela da Silva Savonov ^[3] ; Rafael Humberto Mota de Siqueira ^[4] ; Milton Sérgio Fernandes de Lima ^[5]

Afiliação do(s) autor(es)

^[1] Instituto de Estudos Avançados - Brasil

^[2] Instituto Nacional de Pesquisas Espaciais - Brasil

^[3] Instituto Nacional de Pesquisas Espaciais - Brasil

^[4] Instituto de Estudos Avançados - Brasil

^[5] Instituto de Estudos Avançados - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Soldagem & Inspeção; v. 26, 2021-11-12.

Resumo

Abstract: A circular bead produced by a laser beam (CLW) is a method of joining superposed sheets by scanning circularly a laser beam. Among the various applications, it could be highlighted the welding of austenitic stainless steel AISI 304 sheets for heat exchangers. This work aims to report the effect of fiber laser CLW in tensile shear strength of superposed sheets as well as the corrosion behavior in relation to the process parameters. It was carried out circular beads using stainless steel AISI 304 sheets varying the laser power and speed. The samples were then submitted to optical and electronic microscopy, tensile-shear tests and electrochemical experiments. Among the experimental conditions, the weld sample with 800 W power and 50 mm/s speed presented an ultimate tensile strength of 159 MPa, 17% higher than the sample with the lowest result. The corrosion rate, corrosion and pitting potentials did not change significantly in the welded joint with different conditions compared to the base metal. (AU)

• Processo FAPESP: 16/11309-0 - Estudo, desenvolvimento e aplicação de processo híbrido: Manufatura Aditiva (Ma) + High Speed Machining/Grinding (HSM/G)
• Beneficiário: Reginaldo Teixeira Coelho
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/25229-7 - Fabricação de estruturas de satélites de pequeno porte com uso de lasers
• Beneficiário: Rafael Humberto Mota de Siqueira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado