STP755

    Fatigue Crack Propagation in the Heat-Affected Zone of 2¼Cr-1Mo Steel and ERNiCr-3 Weldments

    Published: Jan 1982


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    Abstract

    The fatigue crack growth rate at 510°C in the heat-affected zone (HAZ) of a 2¼Cr-1Mo steel weldment was examined as a function of frequency and stress-intensity factor. The weldment was made of isothermally annealed 2¼Cr-1Mo steel base metal and ERNiCr-3 weld metal. Fatigue crack growth rate data for thermally aged HAZ material lie between the two scatter bands of data for the base metal and ERNiCr3 filler metal at 510°C. Prior thermal aging up to 2000 h at 566°C does not substantially change the fatigue crack growth rate of HAZ material at 510°C. Fatigue crack growth rate of HAZ material increases with decreasing frequency at 510°C and stress ratio of 0.05 for 20 MPam<ΔK<35MPam.

    Keywords:

    crack propagation affected zone, frequency dependence, thermally aged material, low alloy steel, press vessels


    Author Information:

    Weerasooriya, T
    Associate Research Engineer, Aerospace Mechanics Division, University of Dayton Research Institute, Dayton, Ohio


    Paper ID: STP28412S

    Committee/Subcommittee: A01.22

    DOI: 10.1520/STP28412S


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