Abstract
An experimental investigation of the “Bauschinger effect” in materials under dynamic loading conditions is presented. In this study, a tension split Hopkinson bar with a momentum trap is used to subject a tensile specimen to a single high strain-rate tension pulse of known magnitude and duration. The uniformly deformed gauge length of the tension specimen is then sectioned and loaded in a compression split Hopkinson bar with a momentum trap, at essentially the same strain rate as that of the initial tension test. Comparison is made between these high strain rate Bauschinger experiments and similar tests carried out under quasi-static conditions. Two different material microstructures were examined: solid-solution strengthened and precipitation-strengthened alloys. The Bauschinger effect is found to be a function of the initial material microstructure as well as strain rate.
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