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    Fatigue Crack Propagation in Fast Neutron Irradiated Stainless Steels and Welds


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    Neutron irradiation to a fluence of ̃ 1.2 × 1022 neutrons (n)/cm2, > 0.1 MeV caused a small decrease in the resistance to fatigue crack propagation of Types 308 and 316 submerged-arc weld metals at 800 and 1100°F (427 and 593°C). Nevertheless, the postirradiation fatigue resistances of the weld metals were generally comparable to those of the corresponding base metal. Fatigue crack growth in Types 304 and 316 base metals were also affected by irradiation; the effect was dependent on the stress intensity factor and temperature. Although resistance to crack growth of cold-worked (25 percent) Type 304 stainless steel was only slightly reduced at 800°F by irradiation, the resistance at 1100°F was reduced markedly.


    fatigue (materials), crack propagation, irradiation, radiation, high temperature tests, stainless steels, welded joints, evaluation

    Author Information:

    Shahinian, P
    Consultant, Naval Research Laboratory, Washington, D. C.

    Committee/Subcommittee: E10.08

    DOI: 10.1520/STP33687S