STP683

    Low-Cycle Fatigue of Three Irradiated and Unirradiated Vanstar Alloys

    Published: Jan 1979


      Format Pages Price  
    PDF Version (224K) 11 $25   ADD TO CART
    Complete Source PDF (12M) 11 $149   ADD TO CART


    Abstract

    Results are reported for strain-controlled low-cycle fatigue measurements on Vanstar-7, 8, and 9 in both the irradiated and unirradiated conditions, conducted at 400°C. Specimens were irradiated in the experimental breeder reactor II (EBR-II) to fluences of 0.18 to 6.37 × 1025 neutrons (n)/m2 (E > 0.1 MeV) at 410 to 450°C. The results indicate that neutron irradiation had little or no effect on the fatigue life of any of the alloys. Comparison with data for Types 304 and 316 austenitic stainless steels tested at 400°C shows that on the basis of strain range the irradiated Vanstar alloys are inferior or equivalent to the stainless steels below 10 000 cycles-to-failure but become superior above that point. Proportional limit and yield-strength information have been extracted from the fatigue data, where possible. These data indicate that radiation hardening occurs rapidly at low neutron fluences and that strengthening saturates or increases very slowly above a fluence of approximately 1 × 1025 n/m2.

    Keywords:

    vanadium-base alloys, low-cycle fatigue, neutron irradiation, elevated temperature


    Author Information:

    Korth, GE
    Scientists, EG&G Idaho, Inc., Idaho Falls, Idaho

    Schmunk, RE
    Scientists, EG&G Idaho, Inc., Idaho Falls, Idaho


    Paper ID: STP38182S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP38182S


    CrossRef ASTM International is a member of CrossRef.