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Summary:
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.
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Reproduction Note:
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1931. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
