By using the modified Peierls–Nabarro (P–N) model in which the lattice discrete effect was taken into account, the core structure and the Peierls stress of the ½<111>{110} edge dislocation in molybdenum were investigated in the anisotropic elasticity approximation. The coefficient of the lattice discrete correction and the energy coefficient were all calculated in the anisotropic elasticity approximation. By considering the lattice discrete effect, the core width obtained from the modified P–N model was much wider than the results obtained from the P–N model. Because the Peierls stress of the ½<111>{110} edge dislocation in Mo moving via the rigid mechanism was smaller than that via the kink mechanism, therefore, by investigating the Peierls stress of the edge dislocation obtained using atomistic simulations, it could be deduced that, when the external stress was loaded on the ½<111>{110} edge dislocation in Mo, the dislocation may move via the rigid mechanism rather than via the kink or other mechanism.

The Theoretical Investigations of the Core Structure and the Peierls Stress of the ½<111>{110} Edge Dislocation in Mo. R.Liu, S.Wang, R.Wang, J.Jiao: Materials Science and Engineering A, 2010, 527[18-19], 4887-90