WebOct 1, 2024 · Grain-boundary kinetics: A unified approach. Grain boundaries (GBs) are central defects for describing polycrystalline materials, and playing major role in a … WebFigure 46: Schematic of emission of lattice dislocations into the upper and lower grains under tensile stress σ. (a) Emission of lattice dislocations. (b) Residual lattice dislocations left at the GB after emission. (c) Dissociation of the residual lattice dislocations into GB disconnections following the reaction shown in Fig. 45. (d) Annihilation of the glissile …
Grain-boundary kinetics: A unified approach - Semantic Scholar
WebThe orientation dependence on recovery has been studied in cold-rolled and annealed polycrystalline high-purity aluminium (99.99 wt%), binary Al-0.25Mn and commercial purity aluminium. The growth mechanisms were found to be independent of the alloy system and the microchemistry only influences the coarsening kinetics. Orientation-dependent … WebSep 28, 2011 · A unified model of grain-boundary segregation kinetics is established, which can simulate the equilibrium and non-equilibrium grain-boundary segregation … onslow teacher video
Grain-boundary kinetics: A unified approach - ScienceDirect
WebMar 17, 2024 · A GB slides when the two adjoining grains undergo a relative displacement parallel to the boundary plane. GB sliding, sometimes coupled with GB migration, can strongly affect the inelastic deformation of polycrystalline materials, such as diffusional creep at elevated temperature ( 3, 4) and plastic deformation at ambient temperature ( 5 – 7 ). WebMay 6, 2024 · Grain boundary (GB) dynamics are largely controlled by the formation and motion of disconnections (with step and dislocation characters) along with the GB. The … WebJun 18, 2024 · At the critical value, the loop is structurally equivalent to the so-called “flower defect” and the shrinkage rate diverges. Our results thus reveal a general limit on the formation of grain boundary loops in 2D crystals and elucidate the central role of defects in both the onset of plasticity and the kinetics of grain boundaries. iof northern ireland