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The cyclic yield strength of metals depends on the cyclic plastic deformation, the static mean stress, the number of cycles, and the frequency. For a number of different alloys, the cyclic yield strength in bending was determined as a function of the plastic deformaion and the mean stress. The application of a static stress always caused a reduction of the cyclic yield strength. The magnitude of the reduction depends on the type of material investigated. The results are discussed with respect to possible spring applications.
mechanical tests, stresses, mechanical properties, yield strength, plastic deformation
Supervisor, Mechanics of Materials, Bell Laboratories, Murray Hill, N.J.
Student, Prairie View University, Prairie View, Tex.