Ultrasonic inspection of AA6013 laser welded joints

Ultrasonic inspection of AA6013 laser welded joints

Autor Passini, Adriano Google Scholar
Oliveira, Aline Capella de Autor UNIFESP Google Scholar
Riva, Rudimar Google Scholar
Travessa, Dilermando Nagle Autor UNIFESP Google Scholar
Cardoso, Kátia Regina Autor UNIFESP Google Scholar
Instituição Empresa Brasileira de Aeronáutica S.A.
Instituto de Estudos Avançados
Universidade Federal de São Paulo (UNIFESP)
Resumo Interest in laser beam welding for aerospace applications is continuously growing, mainly for aluminum alloys. The joints quality is usually assessed by non-destructive inspection (NDI). In this work, bead on plate laser welds on 1.6 mm thick AA6013 alloy sheets, using a 2 kW Yb-fiber laser were obtained and inspected by pulse/echo ultrasonic phased-array technique. Good and poor quality welds were inspected in order to verify the limits of inspection, comparing also to X-ray radiography and metallographic inspections. The results showed that ultrasonic phased array technique was able to identify the presence of grouped porosity, through the attenuation of the amplitude of the echo signal. This attenuation is attributed to the scattering of the waves caused by micro pores, with individual size below the resolution limit of the equipment, but when grouped, can cause a perceptive effect on the reflection spectra.
Palavra-chave ultrasonic inspection
pulse
laser welding
aluminum alloy
Idioma Inglês
Data de publicação 2011-09-01
Publicado em Materials Research. ABM, ABC, ABPol, v. 14, n. 3, p. 417-422, 2011.
ISSN 1516-1439 (Sherpa/Romeo, fator de impacto)
Publicador ABM, ABC, ABPol
Extensão 417-422
Fonte http://dx.doi.org/10.1590/S1516-14392011005000057
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:000296277000022
SciELO S1516-14392011000300022 (estatísticas na SciELO)
Endereço permanente http://repositorio.unifesp.br/handle/11600/6605

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