Strain Rate Dependence on Bauschinger Effect in Dual Phase Steel Sheet

Abstract

A compression method for sheet metal was developed, and a compression-tension test under high-speed deformation was performed on three kinds of dual-phase steel sheet, such as those with tensile strength grades of 590MPa, 780MPa and 980MPa. Strain rate range was changed from 7.0×10^-3[1/s] to 100[1/s]. From the results, the following conclusions were drawn. (1) The dual-phase high-strength steel sheet shows a strain rate dependence on the Bauschinger effect. (2) The strain rate dependence on the Bauschinger effect in the dual-phase steel sheet can be formulated. (3) There is no consistency in the strain rate history dependence on the Bauschinger effect for the dual-phase steel sheet.