Mechanical properties of pre-cracked high nitrogen steel under dynamic composite loading

Abstract In this paper, the mechanical properties of pre-cracked high nitrogen steel specimens with different loading angles 30°, 45° and 60° were studied by using Hopkinson tension bar. The corresponding force-displacement curves under obtained. It was found that decrease pre-crack angle, proportion shear stress on in composite gradually increased, concentration appeared during process, fracture strength decreased significantly. At same time, however, dispersion experimental results decreased, morphology tended to be consistent elongation at break. obtained combined can provide reference basis for its technological improvement, safe production reliable application