Quasi-Static and Dynamic Tensile Behavior of CP800 Steel

An experimental investigation on the tensile behavior of Complex Phase 800 (CP800) steel at different strain rates (0.001 to 750 s−1) is reported here. The material is tested on a ZWICK universal testing machine to obtain the stress-strain relationship under quasi-static condition, and on a Hydro-Pneumatic machine and modified Hopkinson bar to study the mechanical behavior at medium and high strain rates, respectively. The failure surfaces of the tested specimens at different strain rates are studied from their fractographs. Finally, the applicability of the existing Cowper-Symonds and Johnson-Cook material models to represent the mechanical behavior of CP800 is examined.