Influence of Residual Welding Stresses on the Fatigue Behaviour of the High Strength Steel StE 690
Earlier investigations have already shown that welding residual stresses can have a considerable influence on the fatigue behaviour of weldments (1). Also new results indicate that the fatigue strength can decrease with increasing tensile residual stresses (2). Additional investigations which offer more quantitative information about the influence of welding residual stresses on the fatigue limit of high strength structural steels were thought to be highly interesting. Therefore in the experiments described here great importance has been attached to get detailed results on the state of residual stress in the fatigue tested specimens. Many residual stress components have been measured by means of X-rays within crack sensitive areas before fatigue testing and during loading breaks.
KeywordsResidual Stress Fatigue Strength High Strength Steel Fatigue Limit Fatigue Behaviour
- (1).Trufjakov, U.I.: Welded joints and residual stresses, British Welding Journal 5 (1958), No. 11, S. 491–498Google Scholar
- (2).Sonsino, C.M.: Böhme, D.; Kulka, C.; Helwig, R.: Slope of the S-Ncurve and high-cycle fatigue behaviour of longitudinal stiffener in as-welded and stress-relieved state, IIW-Document XII1-1242-87Google Scholar
- (3).Gurney, T.R.: Fatigue of welded structures, 2nd Edition 1979, Cambridge University PressGoogle Scholar