Grain-boundary kinetics: a unified approach
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 … WebGrain boundaries (GBs) are central defects for describing polycrystalline materials, and playing major role in a wide-range of physical properties of polycrystals. Control over GB kinetics provides effective means to tailor polycrystal …
Grain-boundary kinetics: a unified approach
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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. WebMar 8, 2024 · Grain boundaries (GBs) that show higher mobility at lower temperatures (i.e., the so-called nonthermally activated or non-Arrhenius GBs) have attracted …
WebOct 8, 2024 · We determined the velocities and curvatures of approximately 52,000 grain boundaries in a nickel polycrystal using three-dimensional orientation maps measured by high-energy diffraction microscopy before and after annealing at 800°C. Unexpectedly, the grain boundary velocities and curvatures were uncorrelated. WebMar 8, 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 dislocation character gives rise to… Expand 6 PDF A Continuum Multi-Disconnection-Mode model for grain boundary migration Chaozhen Wei, Spencer L. Thomas, Jian Han, D. …
Webwhere grain boundary diffusion is dominant are modeled as "Type C" kinetics where diffusion in the bulk-like interior of the grains is frozen out by the relatively low annealing temperature. In this paper we will consider product phase formation under such conditions. "Type C" grain boundary diffusion is driven by a WebDec 23, 2024 · Grain boundary (GB) migration is one of the most important phenomena in materials science, which plays a key role in modifying the microstructures and properties of polycrystalline ceramic materials. Understanding how GB migrates is thus a fundamental and critical issue for future ceramic material design.
WebDec 2, 2024 · Grain boundary motion can be driven by a chemical potential that jumps across a GB or by shear applied parallel to the GB plane; the driving force has three components. Hence, the GB mobility...
WebGrain boundaries (GBs) are central defects for describing polycrystalline materials, and playing major role in a wide-range of physical properties of polycrystals. Control over GB … gpt on wechatWebGrain-boundary kinetics: A unified approach. Progress in Materials Science, 98, 386–476. doi:10.1016/j.pmatsci.2024.05.004 10.1016/j.pmatsci.2024.05.004 gp tool companyWebOct 5, 2024 · Our theoretical model is used to establish a neutral stability surface demarcating stable and unstable perturbations. It is shown that GBs play a … gp tools llcWebJan 11, 2024 · Grain boundary (GB) migration plays an important role in modifying the microstructures and the related properties of polycrystalline materials, and is governed … gptools cpdWebJul 25, 2016 · High Resolution Electron Microscopy of Grain Boundary Motion During Island Grain Shrinkage Published online by Cambridge University Press: 25 July 2016 U. Dahmen , T. Radetic , M.L. Bowers , C. Ophus , A. Gautam and F. Lançon Article Metrics Save PDF Share Cite Abstract An abstract is not available for this content so a preview … g p tool ltd txWebMar 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 ). gpt on windows 10WebJul 1, 2024 · First principles calculations were performed to study the kinetics of four experimentally observed grain boundaries consisting of two general asymmetric … gp toolbox matlab