Simulation of Fracture of Nanocrystalline Metals
A computation sample of nanocrystallion metal with a crack is proposed in this work. The structural evolution scheme is employed to model the mass flow, the grain boundary cavitation, and the crack growth of the specimen under remote loading. The scheme leads to a system of ordinary differential equations that can be solved by Euler integration. The simulation validates the proposal that the ductile versus brittle transition of nano-grained metals is dictated by the competition of creep deformation promoted by grain-boundary kinetics, and the decohesion of grain boundaries.
Wei Yang, Mamtimin Geni, Tiejun Wang and Zhuo Zhuang
F. Yang and W. Yang, "Simulation of Fracture of Nanocrystalline Metals", Advanced Materials Research, Vols. 33-37, pp. 981-986, 2008