STP770

    Low-Cycle Fatigue Behavior of Welded Joints in High-Strength Steels

    Published: Jan 1982


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    Abstract

    Low-cycle fatigue tests are carried out on different types of welded joints in structural steels. The low-cycle fatigue strength of welded joints depends on the weld geometry and the weld toe quality. The influence of these parameters and the role of the microstructure on low-cycle fatigue are discussed. For cruciform joints, the weld toe ground increases the low-cycle fatigue strength. The butt joints present a higher fatigue strength, and this fatigue strength increases when the weld reinforcement decreases. Submerged arc welded butt joints (presenting small reinforcement) have the same low-cycle fatigue strength as as-rolled base metal. The test results are expressed as a function of different fatigue notch factors.

    Keywords:

    low-cycle fatigue, welded joints, surface finish, notch factor, yield strength


    Author Information:

    Lieurade, H-P
    Engineer, Institut de Recherches de la Sidérurgie Française, Saint-Germain-en-Laye,

    Maillard-Salin, C
    Engineer, Institut de Recherches de la Sidérurgie Française, Saint-Germain-en-Laye,


    Paper ID: STP32435S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP32435S


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