Grain boundary 意味
Web粒界リュウカイgrain boundary. 結晶粒界 ともいう．. 多結晶体 の 結晶粒 の 境界 をいう．. 格子欠陥 の 一種 であり，結晶粒の大きい場合には，粒界にそって 破断 が進む原因と … WebΣ3 grain boundaries form as a result of either growth twinning or deformation twinning in face centered cubic (fcc) metals and play a crucial role in determining the mechanical and electrical properties and microstructural stability. We studied the structure and stability of Σ3 grain boundaries (GBs) in fcc metals by using topological ...
Grain boundary 意味
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WebOct 23, 2024 · Grain boundary and point defect scattering have two distinct effects: they both reduce the absolute value of κ Lat and its temperature dependence, as illustrated in Fig. 6(b). WebAug 14, 2007 · The effects of the lattice misorientations at the grain boundaries (GBs) have been included by accounting for the densities of the misfit dislocations at the GBs that accommodate these misorientations. By directly accounting for the misfit dislocations, the strength of the boundary regions can be more accurately represented to account for ...
Webgrain boundaries which are most relevant to recovery, recrystallization and grain growth and will not attempt to give a full coverage of the subject. Further information on grain … WebDec 18, 2009 · It is widely acknowledged that shear stresses drive dislocation motion. The motion of low-angle grain boundaries, which consist of dislocation arrays, under shear stress can be described by the collective movement of the individual dislocations in these boundaries (15, 16).By contrast, the concept of shear stress moving a high-angle grain …
WebFeb 11, 2015 · Grain boundary engineering is a concept developed in the 1980-1990s that would like to increase materials properties by increasing the fraction of coincidence site lattice (CSL) boundaries with ... Web彭海燕，康志新，李小珍，周莉，龙雁球磨时间对NbMoTaWVCr难熔高熵合金组织与性能的影响彭海燕1, 2，康志新2, 3，李小珍2，周莉
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WebFig. 4.1. A grain boundary between two crystals misoriented by an angle about an axis normal to the page. 92 Recrystallization. experimentally (§A2.6.3), and in many cases, we neglect it and consider only the three parameters which define the orientation between the two grains adjacent to a boundary. church of christ charitiesWebGrain Boundary Engineering ―Application to Austenitic Stainless Steels (I)～Character and Behavior of Grain Boundaries～;Hiroyuki Kokawa(Department of Materials … church of christ chapmanville wvIn materials science, a grain boundary is the interface between two grains, or crystallites, in a polycrystalline material. Grain boundaries are two-dimensional defects in the crystal structure, and tend to decrease the electrical and thermal conductivity of the material. Most grain boundaries are preferred … See more It is convenient to categorize grain boundaries according to the extent of misorientation between the two grains. Low-angle grain boundaries (LAGB) or subgrain boundaries are those with a misorientation less … See more The energy of a low-angle boundary is dependent on the degree of misorientation between the neighbouring grains up to the transition to high … See more The movement of grain boundaries (HAGB) has implications for recrystallization and grain growth while subgrain boundary … See more Grain boundaries can cause failure mechanically by embrittlement through solute segregation (see Hinkley Point A nuclear power station) … See more A boundary can be described by the orientation of the boundary to the two grains and the 3-D rotation required to bring the grains into coincidence. Thus a boundary has 5 macroscopic degrees of freedom. However, it is common to describe a … See more The excess volume is another important property in the characterization of grain boundaries. Excess volume was first proposed by Bishop in a private communication to … See more Grain boundaries are the preferential site for segregation of impurities, which may form a thin layer with a different composition from the bulk. For example, a thin layer of silica, … See more church of christ central point oregonWebNov 4, 2024 · High grain boundaries also pose to have excessive hardness and internal strength at the expense of ductility and toughness, thereby subjecting the grain to the point of crack initiation [44]. It ... church of christ chardon ohioWeb結晶粒界（grain boundary）は，異なる結晶方位を持つ隣接粒間の境界である．通常，ある結晶粒中の すべり面は粒界を挟んで不連続であり，通常転位は粒界を通り越えて移 … church of christ charlottesville vaWebMay 1, 2000 · The grain boundary of (334) Σ17b is shown to be a plane matching boundary which is regarded as one of the low energy boundaries. Interface dislocations to assure the coherency at the boundary are ... church of christ celebrate christmasWebSep 30, 2024 · A grain boundary is a general planar defect that separates regions of different crystalline orientation (such as grains) within a polycrystalline solid. Grain … dewalt grinder serial number location