Grain boundary extraction
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 … 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 ...
Grain boundary extraction
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WebSep 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) … WebApr 13, 2024 · Based on the phenomenon of grain boundary blurring or disconnection in metallographic images, this study develops an algorithm based on regional separation for automatically extracting grain boundaries by an improved mean shift method. ... This research has practical value because the proposed algorithm is suitable for grain …
WebFeb 13, 2024 · Nanocrystalline materials (NCMs) exhibit ultra-high strength owing to the high-density grain boundaries (GBs) [1,2,3].However, the wide application of NCMs is hampered by their weak thermal/mechanical stability [4,5,6,7] due to the activation of GB-mediated deformations [], such as nanograin rotation [] and GB migration [].The motion … 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 …
WebApr 15, 2024 · Grain boundaries determine physical properties of bulk materials including ductility, diffusivity, and electrical conductivity. However, the role of grain boundaries in … 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 ...
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 …
Webprocessing program for grain boundary extraction, that is the former part of the whole program, with someexperimental results. 2. ImageProcessing Systemfor Grain Bound-ary Extraction There are manykinds of techniques for line pat-tern extraction from a gray image. In the field of line drawing processing, the algorithm by which dark canine addison\\u0027s diseaseWebBecause 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, canine acute lymphoblastic leukemiaWebApr 1, 2002 · An extraction technique of trap density at grain boundaries (Dgb) in polycrystalline-silicon thin-film transistors with two-dimensional (2D) device simulation has been developed. canine addison\u0027s symptomsWebNov 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 … canine adenovirus treatmentWebMar 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, … canine addison\u0027s disease na/k ratioWebThe grain microstructure evolution in the course of two dimensional (2D) grain growth is considered in greater detail, taking into account the influence of grain boundary triple junctions. canine adenovirus type-1five9 ushealthgroup.com