Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Schwingfestigkeit wetterfester Baustähle im ungeschweißten und geschweißten Zustand nach einer Bewitterung von sechs Jahren

Fatigue behaviour of weathering steels in the unwelded and welded state after an exposure of six years
 
: Müller, F.; Sonsino, C.M.
: Fraunhofer-Institut für Betriebsfestigkeit -LBF-, Darmstadt

Darmstadt, 1991, 14 S. : Abb.,Tab.,Lit.
Technische Mitteilungen - Fraunhofer-Institut für Betriebsfestigkeit Darmstadt, 102
ISSN: 0173-3656
Deutsch
Buch
Fraunhofer LBF ()
Auslagerung; exposure; fatigue behaviour; probe; Schweißverbindung; Schwingfestigkeitsverhalten; specimen; weathering steel; welded joint; wetterfester Baustahl

Abstract
The fatigue behaviour under constant amplitude loading of several charges of the structural steel St 52-3 and the weathering steel WT St 52-3 was examined in the unwelded state (unnotched flat bar) and in the welded state (butt weld, longitudinal stiffener, transverse stiffener) after an environmental exposure of six years. The following results were observed: The weathering steel did not show a better fatigue performance than the normal structural steel, although the loss of material due to corrosion was lower for the weathering steel. After six years of weathering the endurance limit of the unnotched flat bars was reduced by 40% due to the corrosive attack. The fatigue behaviour was not affected, if the specimens were coated by a protective colour before the exposure. The fatigue behaviour of the welded joints was not affected by the corrosion. Even a tendency towards higher fatigue lifes could be observed, as the sharp notch radii of the welds were smoothed during corrosive attack. The fatigue notch factor was reduced and thus the fatigue behaviour was improved.

: http://publica.fraunhofer.de/dokumente/PX-56273.html