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      Residual stress measurement using the contour and the sectioning methods in a mig weld: Effects on the stress intensity factor

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          Abstract

          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.

          Translated abstract

          A distribuição longitudinal de tensões residuais de uma placa fina em alumínio 6082-T6, soldada topo-a-topo por arco eléctrico, foi determinada com o método contour. Mesmo tendo esta técnica sido aplicada a várias geometrias distintas, os autores desconhecem a sua aplicação a uma placa de secção fina como a apresentada no presente trabalho. A validação dos resultados foi efectuada através de resultados obtidos na literatura, incluindo o procedimento CEGB-R6, e também através do já conhecido método experimental de seccionamento. A medição de tensões residuais foi utilizada na previsão do crescimento de uma fenda de fadiga, com o intuito de comparar o comportamento ao de uma fenda a crescer na mesma placa livre de tensões residuais.

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          Residual stress, Part 1: Measurement techniques

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            Author and article information

            Contributors
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Journal
            ctm
            Ciência & Tecnologia dos Materiais
            C.Tecn. Mat.
            Sociedade Portuguesa de Materiais (Lisboa )
            0870-8312
            January 2008
            : 20
            : 1-2
            : 114-119
            Affiliations
            [1 ] Universidade do Porto Portugal
            Article
            S0870-83122008000100017
            0c061fbc-54e3-45f5-b47c-996b0f226d76

            http://creativecommons.org/licenses/by/4.0/

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            SciELO Portugal

            Self URI (journal page): http://www.scielo.mec.pt/scielo.php?script=sci_serial&pid=0870-8312&lng=en
            Categories
            MATERIALS SCIENCE, MULTIDISCIPLINARY

            General materials science
            Contour Method,Fatigue crack growth,MIG welding,Residual stress,SIF calibration,Calibração do factor intensidade de tensão,crescimento de fendas de fadiga,método contour,soldadura MIG,tensão residual

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