Low-Cycle Fatigue of the Weld Metal of a Low-Carbon Steel Welded Joint after High-Temperature Action.

Autor: Nikulin, S. A., Rogachev, S. O., Belov, V. A., Shplis, N. V., Zadorozhnyi, M. Yu.
Zdroj: Russian Metallurgy (Metally); Oct2023, Vol. 2023 Issue 10, p1501-1509, 9p
Abstrakt: Dynamic mechanical analysis is used to perform comparative low-cycle fatigue tests according to the scheme of bending the weld metal of a low-carbon steel 22K welded joint after a high-temperature action according to the following schedule: holding at 1200°C for 3.7 h followed by slow cooling. The weld metal in the initial state is shown to be characterized by low-cycle fatigue high resistance: the fatigue limit for finite life at N = 3.5 × 104 cycles is σRN = 340 MPa. The high-temperature action additionally increases σRN by 23%. The influence of the microstructure of the weld on the fatigue strength characteristics and fracture mechanisms is analyzed. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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