Effects of load mode on mechanical properties of ZrO2 （2Y）／TRIP steel composites

The ZrO2 (2Y)/TRIP steel composites were prepared by vacuum hot-pressing sintering. The room temperature static tensile and dynamic yield strength were tested using the static tensile and Split Hopkinaon Pressure Bar methods, respectively. The effects of load mode on the static and dynamic mechanical behaviors were studied.The results show that the static tensile strengths of the composites decrease with the increase of ZrO2 eontentt for the weak bonding of ZrO2/Zr02. Under the dynamic load, the matrix TRIP steel produces the martinsitic phase transformation, which improves the dynamic strength and deformation ability of the composites. When the volume fraction of ZrO2 exceeds 20 %, the strain-hardening coefficient and the dynamic deformation ability of the composites decrease.