Based on first principles calculations, we studied the structural properties of group V elements P, As, Sb and Bi on the Si(001) surface. For one monolayer of the group V atoms on the Si(001) substrate, stress and stress anisotropy scaled almost linearly with atomic size, implying that the obvious source of surface stress was atomic size effect. We found that stress relief was responsible for t...

Laser shock peening (LSP) can introduce a compressive stress profile for improving the materials’ surface mechanic properties. 6065 Aluminium alloy is introduced recently in the aeronautic components. The surface performances of the components are related directly to the surface activity and surface corrosion properties which are influenced by the near-surface stress gradient. So, the determina...

Laser Shock Processing (LSP) is an innovative surface treatment technology. LSP can induce compress residual stress layer in the surface of metallic materials, which is used for improving the fatigue life. In this study, the propagation course of typical laser shock wave in material was analyzed according to the theory of plasticity dynamics and the theory of stress wave. The effects of laser s...