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Korrosionsschwingfestigkeit von geschweißtem Walzstahl und Stahlguß-Verbund für Maschinen-, Brücken-, Fahrzeugbau und Meerestechnik

Corrosion fatigue of welded joints from rolled structural and cast steels for mechanical, bridge, automotive engineering and marine technology
: Lipp, K.; Sonsino, C.M.; Lachmann, E.
: Industrieanlagen-Betriebsgesellschaft mbH -IABG-, Ottobrunn; Fraunhofer-Institut für Betriebsfestigkeit -LBF-, Darmstadt

Darmstadt: Fraunhofer LBF, 1994, 90 pp. : Abb.,Tab.,Lit.
LBF-Bericht, FB-202
ISSN: 0721-5320
Reportnr.: TF-3308
Fraunhofer LBF ()
cast steel; cathodic protection; constant amplitude loading; fatigue behaviour; free corrosion; freie Korrosion; kathodischer Korrosionsschutz; Lebensdauerlinie; Schweißverbindung; Schwingfestigkeit; Stahlguß; structural steel; variable amplitude loading; Walzstahl; welded joint; Wöhlerlinie; Korrosionsbeständigkeit; Maschinenbau; Brückenbau; Fahrzeugbau; Meerestechnik; Lebensdauer; Walzen; Einstufenversuch; Betriebsbeanspruchung; Lebensdauerabschätzung

By welding of cast steel intersections between rolled structural steels the welds can be removed to areas of low stresses and so the fatigue life of the structure can be improved significantly. However, for a safe and economic design the knowledge of the fatigue behaviour of weldings between cast and structural steels under corrosion is required. Since such fatigue data was not yet available, the fatigue behaviour of butt welded joints between cast and structural steels having a minimum yield strength of 500 MPa was investigated in artificial sea water under loading spectra which are typical for offshore structures. Tests were performed with a loading ratio of R equals -1 under free corrosion as well as under cathodic protection with a potential of -1080 mV against calomel and a frequency of f equals 10 s high -1. For the random fatigue tests two different loading spectra, the so-called ECSC- and the WASH1-Sequence, were used.