Resumo

RICHTER-TRUMMER, Valentin, TAVARES, Sérgio M. O., MOREIRA, Pedro M. G. P. et al. Residual stress measurement using the contour and the sectioning methods in a mig weld: Effects on the stress intensity factor. C.Tecn. Mat., jan. 2008, vol.20, no.1-2, p.114-119. ISSN 0870-8312.

The longitudinal residual stress distribution in a 6082-T6 aluminum alloy MIG butt welded thin plate was determined using the contour method. Although several geometries have been successfully studied with the contour method before, the authors are not aware of previous attempts to use this method in a long narrow section as in the present case. Validation was done using literature data including the CEGB-R6 procedure as well as experimental plate surface measurements obtained using the established sectioning technique. The residual stress measurement was used in fatigue crack growth simulations in order to compare the fatigue behavior of the plate with and without residual stress.

Palavras-chave: Contour Method; Fatigue crack growth; MIG welding; Residual stress; SIF calibration.