Impact of nano crack and loading direction on the tensile features of FeCr alloy: a molecular dynamics analysis

Abstract

The existence of cracks and variations in loading direction has invoked greater modifications in the material properties. In this work, the tensile features of cracked and non-cracked FeCr polycrystals have been analyzed under numerous temperatures (300 K, 500 K, 700 K, and 900 K) and loading directions (parallel and normal to the crack cross-sectional directions) through molecular dynamics and it is originated that temperature has raised a higher impact on the tensile features trailed by the existence of crack and loading directions, owing to the formation of larger kinetic energy (KE) amidst the atoms. The existence of crack offers a moderate impression on the tensile behavior followed by the loading direction, due to its dominant impact on the tensile behavior through greater stress concentrations. Additionally, it is stated that the greater temperature along with the existence of crack and loading along normal to the crack cross section offers greater reductions in the tensile features of FeCr polycrystal, owed to the interactive effect of larger KE and discontinuity among atoms. Furthermore, the shear strain and displacement contour map and materials feature also confirm a similar occurrence which leads to altering its material behavior.