The effect of anisotropy of crystal structure orientation on deformation behavior of 09Mn2Si steel under cyclic tension: Simulation by excitable cellular automata method

By means of computer simulation, deformation behavior of 09Mn2Si structural steel subjected to helical rolling was studied. Two different kinds of grain structure orientation were simulated. Calculations were aimed at constructing patterns of spatial distribution of (i) elastic energy, (ii) torsion energy, and (iii) components of local force moments with the use of excitable cellular automata method. It has been shown that preferential pattern of grain structure orientation gives rise to a high level of microrotations, which, in turn, leads to decreasing the stress level. Comparison of two studied structures under uniaxial cyclic tension has shown that the preferential pattern of grain structure orientation along the loading axis provides higher resistance to defect nucleation compared to a transversely oriented one.