STP174

    Creep, Rupture, and Notch Sensitivity Properties of S-816 Alloy up To 1650 F Under Fatigue and Static Stress

    Published: Jan 1956


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    Abstract

    Fatigue, rupture, and creep data obtained under various combinations of mean and alternating stress are presented for S-816 alloy at temperatures of 75, 1350, 1500, and 1650 F. Tests were performed under axial stress on unnotched specimens and specimens having theoretical stress concentration factors of 2.4 and 3.4. The data are presented as S-N curves and stress range diagrams to show the effect of specimen notch, temperature, ratio of alternating-to-mean stress, and stress magnitude on the fatigue and creep properties. The role of both creep and fatigue as design factors and the relation of notch sensitivity to loading conditions are discussed with particular reference to temperature and ratio of alternating-to-mean stress.


    Author Information:

    Vitovec, F.
    Associate Professor of Mechanics and Materials, and Professor and Head of Department of Mechanics and Materials, University of Minnesota, Minneapolis, Minn

    Lazan, B. J.
    Associate Professor of Mechanics and Materials, and Professor and Head of Department of Mechanics and Materials, University of Minnesota, Minneapolis, Minn


    Paper ID: STP44989S

    Committee/Subcommittee: E01.21

    DOI: 10.1520/STP44989S


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