Grain boundary extraction

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August undefined, 2024

WebJul 23, 2024 · Grain boundaries (GBs) are a kind of lattice imperfection widely existing in two-dimensional materials, playing a critical role in materials’ properties and device performance. Related key issues in this … WebMar 16, 2024 · Grain boundary extraction aims to extract the grain boundaries. For example, in Xu et al.'s paper [30], an improved mean shift method is presented for …

Probing the role of grain boundaries in single Cu nanoparticle ...

WebNov 26, 2024 · The mechanical properties of high-entropy alloys are superior to those of traditional alloys. However, the key problem of finding a strengthening mechanism is still challenging. In this work, the molecular dynamics method is used to calculate the tensile properties of face-centered cubic Al0.1CoCrFeNi high-entropy alloys containing … WebApr 9, 2024 · HIGHLIGHTS. who: Fatah Chiter from the (UNIVERSITY) have published the article: Corrosion inhibition at emergent grain boundaries studied by DFT for 2-mercaptobenzothiazole on bi-crystalline copper, in the Journal: (JOURNAL) what: The authors report DFT calculations that bring atomic-scale insight on how the MBT corrosion … in a vb.net project what is comreference tag

Grain boundary extraction method based on pixel relationship - …

WebDec 31, 2024 · The Frank-Read model, as a way of generating dislocations in metals and alloys, is widely accepted. In the early 1960s, Li proposed an alternate mechanism. Namely, grain boundary sources for dislocations, with the aim of providing a different model for the Hall-Petch relation without the need of dislocation pile-ups at grain boundaries, or … WebApr 15, 2024 · Grain boundaries determine physical properties of bulk materials including ductility, diffusivity, and electrical conductivity. However, the role of grain boundaries in nanostructures and nanoparticles is much less understood, despite the wide application of nanoparticles in nanophotonics, nanoelectronics, and heterogeneous catalysis. Here, we … WebThe grain boundary is not an ideal atom source with no energy barrier for operation, but a source needing a critical driving force that varies with the nature of the boundary and … duties of junior engineer on board ship

Algorithm based on regional separation for automatic grain boundary ...

WebThe existing algorithms used for grain bound- ary extraction have achieved ideal effects in certain metallographic images. This study presents a fast and accurate algorithm … WebExperimental observation shows that the grain boundaries obtained by the proposed algorithm are highly complete and accurate. This research has practical value because … in a vector is x corordinatontopWebMar 6, 2024 · As a result of multiple phases or grain boundaries in material systems, the EBSD measurement is partially unable to assign the correct diffraction patterns unambiguously. By comparing all ORs at the different threshold values and the average values of both alloys, the smallest rotational deviations are obtained for the GT OR, … in a variety of cancers

"WebApr 11, 2024 · Microstructural characteristics, including grain boundary (GB) type, grain size, defects, and various impurities among others, have important impacts on the mechanical properties of solid metals. ... Snapshots for dislocation extraction algorithm of Ni–Cr alloys with different Cr solution concentrations with segregation under the shock … " - Grain boundary extraction

Grain boundary extraction

Crystals Free Full-Text Orientation Relationship of FeNiC and ...

WebMeasurement of the geometry of triple junctions between grain boundaries in polycrystalline materials is used to generate large sets of dihedral angles from which … WebSep 11, 2024 · Understanding the coercivity mechanism has had a substantial impact on developing economically more attractive RE-based (RE = rare earth) permanent materials because of price volatility of key RE metals (i.e., Nd and Dy) in recent years. In this work, we investigated the microstructure and magnetic properties of melt-spun …

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WebNov 30, 2024 · Special Issue Information. Dear Colleagues, Grain boundary segregation is a phenomenon of increasing importance, mainly in connection with stabilization of nanocrystalline structures. Simultaneously, the interest in grain boundary segregation is accelerated by the development of the methods of theoretical calculations and their … WebResearch on the Algorithm Used for Grain Boundary Extraction from Metallographic Images and Design of Intelligent Rating Software - CNKI. Knowledge Network Node. …

WebBecause the atomic packing at grain boundaries is less dense than in the perfect crystal, grain boundaries are associated with a free or excess volume which depends on the crystallography of the boundary (§4.4.3). This leads to a strong interaction with solute atoms and to the formation of a solute atmosphere which, at low boundary velocities, Webgrain boundaries obtained by the algorithm proposed in this study are much more complete and accurate compared to those identified by other algorithms. 2. Development of the algorithm used for grain boundary extraction from metallographic images Unlike ordinary digital images, a metallographic image mainly depicts grains and grain boundaries;

WebOct 8, 2024 · Figure 1 presents the Σ5 (310) grain boundary model in face-centered cubic Cu, where the numbers 1, 2, 3, and 4 denote for the four different substitutional sites at the interface 23 ab-initio ... WebApr 13, 2024 · Grain boundary extraction is an important part of grain size analysis in material science. In this research, a method used for grain boundary extraction with …

WebJun 20, 2016 · This grain boundary healing process was found to play a crucial role in carrier lifetime improvement, suppression of non-radiative recombination at grain boundaries, and effective extraction of ...

WebOct 9, 2007 · Based on a Mumford–Shah type functional, grain boundaries are described as free discontinuity sets at which the orientation parameter for the lattice jumps. The lattice structure itself is encoded in a suitable integrand depending on a local lattice orientation and one global elastic displacement. ... Grain boundary extraction; Phase field ... in a variety of 意味WebThis research has practical value because the proposed algorithm is suitable for grain boundary extraction from most metallographic images. Metallographic microscopy shows that the vast majority of metal materials are composed of many small grains; the grain size of a metal is important for determining the tensile strength, toughness ... in a value stream the definition of level isWebMay 22, 2016 · We investigate the mechanisms of incipient plasticity at low angle twist and asymmetric tilt boundaries in fcc metals. To observe plasticity of grain boundaries independently of the bulk plasticity, we simulate nanoindentation of bicrystals. On the low angle twist boundaries, the intrinsic grain boundary (GB) dislocation network deforms … in a vector is x coordinatesWebAug 1, 2024 · DOI: 10.1016/j.measurement.2024.111796 Corpus ID: 251828838; Grain boundary extraction method based on pixel relationship @article{HanWang2024GrainBE, title={Grain boundary extraction method based on pixel relationship}, author={Yu Han Wang and Qing He and Zhi Xie}, journal={Measurement}, year={2024} } duties of lawn care serviceWebMeasurement of the geometry of triple junctions between grain boundaries in polycrystalline materials is used to generate large sets of dihedral angles from which maps of the grain boundary energy are extracted. A preliminary analysis has been performed for samples of magnesia and aluminum based on a three-parameter description of grain … in a vein meaningWebThe influence of different processing routes and grain size distributions on the character of the grain boundaries in Li7La3Zr2O12 (LLZO) and the potential influence on failure through formation of percolating lithium metal networks in the solid electrolyte are investigated. Therefore, high quality hot-pressed Li7La3Zr2O12 pellets are synthesised with two … duties of law enforcement officersWebSep 23, 2024 · A suite of 37 molecular dynamics simulations is conducted at two system sizes to systematically characterize the role of grain boundary (GB) misorientation on spall strength in pure BCC tantalum (Ta). The systems studied consist of bicrystals with a single [110] symmetric tilt grain boundary. Two loading conditions are compared: (i) … duties of law enforcement