3D Discrete Dislocation Dynamics Simulations of Multiple Spiral Dislocation Sources

A spiral dislocationSpiral dislocation source is a dislocation with one end fixed on the slip plane, while the other end of the spiral dislocationSpiral dislocation source is at a grain boundaryGrain boundaries or a free surfaceFree surfaces. In the current study, 3D dislocation discrete dynamics (DDDDDD) simulations, which is a simulation method that can emulate the collective motion of dislocations and predict the constitutive behavior of a crystalline materialMaterials, is used to simulate, and capture the interaction between the spiral dislocationSpiral dislocation sources. The simulation results show that the flow stressFlow stress in the computational domain is dependent of the number of spiral sources. Another important simulation result from the current study is that an edge FR source can be produced from two screw spiral dislocationsSpiral dislocation that are moving in the same direction on the same slip plane.