Ultrasonic inspection of AA6013 laser welded joints

Ultrasonic inspection of AA6013 laser welded joints

Author 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
Institution Empresa Brasileira de Aeronáutica S.A.
Instituto de Estudos Avançados
Universidade Federal de São Paulo (UNIFESP)
Abstract 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.
Keywords ultrasonic inspection
pulse
laser welding
aluminum alloy
Language English
Date 2011-09-01
Published in Materials Research. ABM, ABC, ABPol, v. 14, n. 3, p. 417-422, 2011.
ISSN 1516-1439 (Sherpa/Romeo, impact factor)
Publisher ABM, ABC, ABPol
Extent 417-422
Origin http://dx.doi.org/10.1590/S1516-14392011005000057
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000296277000022
SciELO ID S1516-14392011000300022 (statistics in SciELO)
URI http://repositorio.unifesp.br/handle/11600/6605

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