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Publications (10)
The correlations between the mobility and crystallographic parameters of twist grain boundaries (GBs) are investigated based on a mobility dataset created by molecular dynamics simulations using a modified synthetic driving force method. Statistically, low-angle twist GBs are not less or more mobile than high-angle ones, but twist GBs with axes nea...
The intrinsic mobilities of a series of symmetrical tilt grain boundaries (GBs) in Al were simulated using a modified synthetic driving force method. Statistical analysis of the mobility data reveals that low-angle GBs are on average more mobile and show larger spread in their mobilities than high-angle GBs. GBs with axes broadly near 〈111〉 or boun...
Ultrafine-grained commercial-purity aluminum (AA1070) sheets produced by four cycles of accumulative roll-bonding (ARB) without lubrication are subjected to annealing treatments in the temperature range from 250 °C to 400 °C. Microstructures and microtextures in the surface and center regions of the ARBed and annealed sheets are measured by electro...
The synthetic driving force (SDF) molecular dynamics method, which imposes crystalline orientation-dependent driving forces for grain boundary (GB) migration, has been considered deficient in many cases. In this work, we revealed the cause of the deficiency and proposed a modified method by introducing a new technique to distinguish atoms in grains...
The sphere bicrystal model for calculating the energy of an arbitrary grain boundary (GB) was corrected by deleting unreasonable atoms located at the boundary. This model was then applied to calculate the energies of three categories of GBs in Al to validate the modification, and used to investigate the dependencies of GB energy on GB parameters. T...
Nucleation and grain growth are important phenomena during static recrystallization of metallic materials and both processes have significant influences on the material properties. The Monte Carlo (MC) method has been widely used to simulate static recrystallization behavior during annealing of metallic materials. In this study, an MC model for sta...
Equal-channel angular extrusion (ECAE) provides exciting opportunities to explore the role of strain path change (SPC) in grain refinement by severe plastic deformation (SPD). In this study, crystal plasticity simulations were carried out using a viscoplastic self-consistent model for a face-centered cubic model material processed via an extended r...
The effect of annealing temperature on the development of microstructure and texture in an α+β titanium alloy Ti–6.5Al–3.5Mo–1.5Zr–0.3Si (TC11) preformed by hot working was investigated with the aid of electron back-scattered diffraction and X-ray diffraction measurements. It is shown that considerable microstructure and texture heterogeneities wer...
