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    Fatigue and Impact Testing of Welded Products

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    Fatigue and impact testing on a material do not correlate until the energy of the impact blow approaches a very small value. Single-blow impact results plotted against typical fatigue values for steel are very well illustrated by Fig. 1. Repeated light-blow impact test results plotted against fatigue values are shown in Fig. 2 and indicate a less scattered result. When still lighter impact blows are applied the correlation becomes very much closer. This is brought out in a discussion by J. M. Lessells of the Westinghouse Electric and Manufacturing Co., and is shown in Fig. 3. Figures 1 and 2 are plotted from the results of the Fatigue of Metals Investigation obtained at the University of Illinois and sponsored by the National Research Council.

    Author Information:

    Jasper, T. M.
    Director of Research, A. O. Smith Corporation, Milwaukee, Wis.

    Committee/Subcommittee: A01.22

    DOI: 10.1520/STP47549S