Grain boundary phases in bcc metals
WebFeb 7, 2024 · We use atomistic simulations to investigate grain boundary (GB) phase transitions in elemental body-centered cubic (bcc) metal tungsten. Motivated by recent modeling study of grain boundary phase transitions in [100] symmetric tilt boundaries in face-centered cubic (fcc) copper, we perform a systematic investigation of [100] and …
Grain boundary phases in bcc metals
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WebDec 7, 2024 · In this review, the phenomenon of grain boundary (GB) wetting by the second solid phase is analyzed for the high entropy alloys (HEAs). Similar to the GB wetting by the liquid phase, the GB wetting by the second solid phase can be incomplete (partial) or complete. In the former case, the second solid phase forms in the GB of a matrix, the … WebWe report a computational discovery of novel grain boundary structures and multiple grain boundary phases in elemental bcc tungsten. While grain boundary structures created …
WebMar 18, 2024 · The theory of grain boundary (the interface between crystallites, GB) structure has a long history 1 and the concept of GBs undergoing phase transformations was proposed 50 years ago 2, 3. The ... WebDec 30, 2024 · Abstract—The results of the density functional theory calculation of the segregation energy of refractory metals at grain boundaries (GBs) in the alloys based on nickel (fcc solid solutions), chromium (bcc), and titanium (hcp) are analyzed.The influence of segregation on the cohesive strength of GBs is estimated using the Rice–Wong model, …
WebWhile grain boundary structures created by the γ-surface method as a union of two perfect half crystals have been studied extensively, it is known that the method has limitations … WebAbstract. We report a computational discovery of novel grain boundary structures and multiple grain boundary phases in elemental bcc tungsten. While grain boundary structures created by the \gamma-surface method as a union of two perfect half crystals have been studied extensively, it is known that the method has limitations and does not …
WebThis process is particularly convenient for achieving non-equilibrium microstructures in body-centered cubic (BCC) metals, which are not easily produced with nanocrystalline grain sizes through other SPD processes due to the lack of a close-packed slip system facilitating high deformation strains.
WebNov 30, 2024 · In practice, most components often receive impact loads during service. In order to ensure the service safety of components, impact toughness evaluation is essential. To the best of our knowledge, the previous studies were mainly focused on the quasi-static tensile deformation, and the impact toughness of bimodal grain structured metals have … chimney sweepers in san antonio txWebJul 1, 2024 · It is well known that grain boundaries (GBs) increase the electrical resistivity of metals due to their enhanced electron scattering. The resistivity values of GBs are determined by their... graduation wedgesWebAccording to the 2008 Comprehensive Plan, “ the primary function of the Rural Area as reflected by the Long-Range Land Use Plan Map is to maintain open space, protect … graduation woman svgWebApr 10, 2024 · In this study, we focus on two tilt symmetric grain boundaries (GBs) Σ5(210) and Σ5(310) commonly observed in the polycrystalline metals and alloys [].In order to establish MD models, two symmetric BCC Hf grains are first combined to construct a central GB (Fig. 1a). The lattice constant is taken as 3.431 Å, which is the average value of the … chimney sweepers birds in a fireplaceWebOur hypothesis is that the increased grain boundary density will lead to low bubble formation and bubble damage in the grain matrices, but the effect of grain boundary density can also be phase-dependent (FCC vs. BCC). in situ transmission electron microscopy (TEM) coupled with helium bombardment was used to implant helium, and … chimney sweepers in raleigh ncWebOct 15, 2024 · We use atomistic simulations to investigate grain boundary (GB) phase transitions in elemental body-centered cubic (bcc) metal tungsten. Motivated by recent … graduation wine bottleWebApr 10, 2024 · In this study, we focus on two tilt symmetric grain boundaries (GBs) Σ5(210) and Σ5(310) commonly observed in the polycrystalline metals and alloys [].In order to … chimney sweepers victorian times