Rapid Growth of Garnet within a Metamorphic Vein Inferred from Misorientation Angle Distribution of Garnet Porphyroblasts

2006 ◽  
Author(s):  
Atsushi Okamoto
Keyword(s):  
Misorientation Angle ◽  
Rapid Growth ◽  
Angle Distribution ◽  
Garnet Porphyroblasts ◽  
Misorientation Angle Distribution

Evolution of the Texture on Primary Recrystallization and Grain Growth in Fe-3%Si Steels

2007 ◽  
Vol 558-559 ◽  
pp. 747-750 ◽  
Author(s):  
Kyu Seok Han ◽  
Jong Tae Park ◽  
Jae Kwan Kim ◽  
Jerzy A. Szpunar
Keyword(s):  
Misorientation Angle ◽  
Annealing Temperature ◽  
Secondary Recrystallization ◽  
Orientation Distribution ◽  
High Energy ◽  
Primary Recrystallization ◽  
Silicon Steel ◽  
Angle Distribution ◽  
X Ray ◽  
Misorientation Angle Distribution

Recrystallization texture in grain oriented silicon steel at different annealing temperature is investigated. Normalized x-ray intensities of various orientation components observed in Orientation Distribution Function are used for comparison. The computed CSL boundary distributions about Goss component with annealing condition were calculated. The misorientation angle distribution is also measured in order to find the importance of high-energy boundary with misorientation 20~45° range for the secondary recrystallization of Goss grain. From the analysis of CSL boundary distribution and misorienation angle distribution, the distribution of CSL boundaries does not evidently show any preferred difference between Goss and other texture components. Whereas, the misorientation angle analysis shows that the number of 20°~45° misoriented boundaries is higher around the Goss grains than around other texture components.

scholarly journals Secondary Recrystallization Goss Texture Development in a Binary Fe81Ga19 Sheet Induced by Inherent Grain Boundary Mobility

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1254
Author(s):  
Zhenghua He ◽  
Yuhui Sha ◽  
Ning Shan ◽  
Yongkuang Gao ◽  
Fan Lei ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Grain Growth ◽  
Misorientation Angle ◽  
Secondary Recrystallization ◽  
Angle Distribution ◽  
Boundary Mobility ◽  
Goss Texture ◽  
Grain Boundary Mobility ◽  
Misorientation Angle Distribution

Secondary recrystallization Goss texture was efficiently achieved in rolled, binary Fe81Ga19 alloy sheets without the traditional dependence on inhibitors and the surface energy effect. The development of abnormal grain growth (AGG) of Goss grains was analyzed by quasi-situ electron backscatter diffraction (EBSD). The special primary recrystallization texture with strong {112}–{111}<110> and weak Goss texture provides the inherent pinning effect for normal grain growth by a large number of low angle grain boundaries (<15°) and very high angle grain boundaries (>45°) according to the calculation of misorientation angle distribution. The evolution of grain orientation and grain boundary characteristic indicates that the higher fraction of high energy grain boundaries (20–45°) around primary Goss grains supplies a relative advantage in grain boundary mobility from 950 °C to 1000 °C. The secondary recrystallization in binary Fe81Ga19 alloy is realized in terms of the controllable grain boundary mobility difference between Goss and matrix grains, coupled with the orientation and misorientation angle distribution of adjacent matrix grains.

Modelling of the Evolution of Dislocation Cell Misorientation under Severe Plastic Deformation

2006 ◽  
Vol 503-504 ◽  
pp. 675-680 ◽  
Author(s):  
Yuri Estrin ◽  
László S. Tóth ◽  
Yves Bréchet ◽  
Hyoung Seop Kim
Keyword(s):  
Plastic Deformation ◽  
Distribution Function ◽  
Misorientation Angle ◽  
Dislocation Cell ◽  
Angle Distribution ◽  
Angular Pressing ◽  
Probabilistic Description ◽  
Misorientation Angle Distribution ◽  
Dislocation Cells ◽  
Basic Version

A model describing the evolution of the misorientation angle between dislocation cells with plastic strain is proposed. The model is applied to the case of equal channel angular pressing (ECAP) of copper. In a basic version of the model, the evolution of the average misorientation angle is traced. A way of handling the evolution of the misorientation angle distribution function using a probabilistic description is also outlined.

Inclusion patterns in zoned garnets from Magerøy, north Norway

1984 ◽  
Vol 48 (346) ◽  
pp. 21-26 ◽  
Author(s):  
T. B. Andersen
Keyword(s):  
Rapid Growth ◽  
Outer Zone ◽  
Prograde Metamorphism ◽  
Growth Type ◽  
Compositional Zoning ◽  
Garnet Porphyroblasts ◽  
The Matrix ◽  
Quartz Grains

AbstractGarnet porphyroblasts in metasediments from Magerøy crystallized during static metamorphism. They display three optical zones, each having characteristic inclusions and chemistry. The compositional zoning is related to prograde metamorphism (an inner zone, 1, and a graphite-bearing zone) and retrogression (the outer zone, 2). Inclusions of two types are present in zone 1: type 1 are equidimensional remnants of the matrix, preferentially included along planes of rapid growth; type 2 are tubular and represent recrystallized quartz grains concentrated along defects in the garnet lattice. The defects are lineage boundaries between growth segments related to screw dislocations on crystal faces. Crystal growth developed at relatively high degrees of supersaturation, but below the supersaturation required for the development of dendrites. The inclusions suggest rapid growth of zone 1, caused by heat flow from an adjacent interkinematic mafic/ultramafic intrusive complex. The graphite-bearing zone crystallized at the metamorphic peak, while the inclusion-free idioblasfic rim probably developed during retrograde metamorphism.

Evolution of domains and grain boundaries in graphene: a kinetic Monte Carlo simulation

2016 ◽  
Vol 18 (4) ◽  
pp. 2932-2939 ◽  
Author(s):  
Jianing Zhuang ◽  
Ruiqi Zhao ◽  
Jichen Dong ◽  
Tianying Yan ◽  
Feng Ding
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Kinetic Monte Carlo ◽  
Annealing Process ◽  
Angle Distribution ◽  
Distribution Analysis ◽  
Boundary Misorientation ◽  
Kinetic Monte Carlo Simulation ◽  
Grain Boundary Misorientation ◽  
Misorientation Angle Distribution

Energy-driven kinetic Monte Carlo simulation of graphene fast annealing process and graphene grain boundary misorientation angle distribution analysis.

Removing Substrate Background in TEM Microanalysis

1974 ◽  
Vol 32 ◽  
pp. 568-569
Author(s):  
John C. Russ ◽  
Nicholas C. Barbi
Keyword(s):  
Electrical Conductivity ◽  
Rapid Growth ◽  
Organic Film ◽  
Absolute Concentration ◽  
Background Signal ◽  
X Ray ◽  
Elemental Concentrations ◽  
Transmission Electron ◽  
Electron Microscopes ◽  
The Continuum

The rapid growth of interest in attaching energy-dispersive x-ray analysis systems to transmission electron microscopes has centered largely on microanalysis of biological specimens. These are frequently either embedded in plastic or supported by an organic film, which is of great importance as regards stability under the beam since it provides thermal and electrical conductivity from the specimen to the grid.Unfortunately, the supporting medium also produces continuum x-radiation or Bremsstrahlung, which is added to the x-ray spectrum from the sample. It is not difficult to separate the characteristic peaks from the elements in the specimen from the total continuum background, but sometimes it is also necessary to separate the continuum due to the sample from that due to the support. For instance, it is possible to compute relative elemental concentrations in the sample, without standards, based on the relative net characteristic elemental intensities without regard to background; but to calculate absolute concentration, it is necessary to use the background signal itself as a measure of the total excited specimen mass.

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