Fatigue crack propagation properties of welded joints were investigated on steel plate for boilers and other pressure vessels. The fatigue crack propagation properties at 300°C became similar to those at room temperature when the thermal stress could be reduced down to −1 MPa by using center cracked type specimen with longitudinal slits and a specially designed furnace. The tensile residual stress was +152 MPa in the as-welded joint, and +12 MPa after PWHT. The fatigue threshold was about 2.7, 5.1 and 7.3 MN/m3/2 for weld metal in the as-welded condition, after PWHT and the base metal, respectively.
Fatigue Crack Propagation Properties of Welded Joints at 300°C
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division May 2, 2002; revised manuscript received February 3, 2003. Associate Editor: D. P. Jones.
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Ohta, A., Suzuki , N., and Maeda, Y. (May 5, 2003). "Fatigue Crack Propagation Properties of Welded Joints at 300°C ." ASME. J. Pressure Vessel Technol. May 2003; 125(2): 131–135. https://doi.org/10.1115/1.1563628
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