Fatigue of Low Carbon Steels as Influenced by Repeated Strain Aging
by
Huseyin Sehitoglu
Department of Theoretical and Applied Mechanics
Abstract
A “repeated strain aging” technique is introduced to enhance the yield strength of ASTM A-36 steel. Results obtained indicate that the yield strength may be increased as much as 55%. The fatigue behavior of repeatedly strained aged smooth specimens is examined. The same technique is applied to notched members to enhance the yield strength of the material at the notch root. Fatigue tests on repeatedly strain aged plates indicate that long life improvements are observed compared to unaged plates of the same material and geometry.
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