Atomistic study on crystal orientation-dependent crack propagation and resultant microstructure anisotropy in NiTi alloys

Effects of Grain Boundary Misorientation Angle on the Mechanical Behavior of Al Bicrystals

“…Tensile and fatigue resistance of metallic materials greatly depends on grain size and the effect of the misorientation angle on the propagation of tiny and sharp defects [1][2][3][4][5][6][7]. In order to improve mechanical and fatigue properties, the interaction between defects and GB has to be investigated.…”

“…Single crystals normally show brittle behavior, whereas bicrystals tend to be ductile due to the presence of the GB [6,7]. On the other hand, considering that the relative grain misorientation angle plays an important role in the tensile and crack propagation resistances of crystalline materials [5][6][7][9][10][11][12][13][14], the effect of this angle is another factor that has to be deeply studied for a better understanding of some failure mechanics that occur in metallic materials, such as ductile, brittle and fatigue failure. The effect of the GB on the fatigue life has been investigated for polycrystals by means of nanomechanical experiments to improve the mechanical response under fatigue loads [15].…”