Last edited by Telrajas
Tuesday, August 11, 2020 | History

2 edition of Evolution of grain boundary character distributions in FCC and BCC materials. found in the catalog.

Evolution of grain boundary character distributions in FCC and BCC materials.

Peter Keng-Yu Lin

Evolution of grain boundary character distributions in FCC and BCC materials.

by Peter Keng-Yu Lin

  • 213 Want to read
  • 3 Currently reading

Published by National Library of Canada = Bibliothèque nationale du Canada in Ottawa .
Written in English


Edition Notes

SeriesCanadian theses = Thèses canadiennes
The Physical Object
Pagination123 leaves.
Number of Pages123
ID Numbers
Open LibraryOL19303545M
ISBN 100612279944

  Grain boundaries influence a wide array of properties in polycrystalline materials, 1 including diffusivity, 2,3,4 conductivity, 5,6,7 intergranular cracking, 8 corrosion resistance, 9, Analysis of Grain Boundary Networks and Their Evolution During Grain Boundary Engineering ), pp. – Google Scholar. Crossref. Search ADS Watanabe, T., , “ The Impact of Grain Boundary Character Distribution on Fracture in Polycrystals A Review on Atomistic Simulation of Grain Boundary Behaviors in Face-Centered Cubic.

There is little understanding of the direct link between grain boundary character and density, and defect denuded zones. For example, the role of reduced grain size to the nanocrystalline regime and subsequent increase in grain boundary density is not fully understood in the context of dislocation or void behavior near grain boundaries. interaction between Mn and C in the bulk and at the incoherent S3() grain boundary (GB) of bcc Fe using DFT. The S3() boundary is chosen since its structure has a relatively short periodicity, thus providing a reasonable limit on the number of boundary sites that Mn and C can occupy.

  Grain boundaries (GBs) affect many mechanical and physical properties of polycrystalline materials. Their influence on plastic deformation has been investigated in detail by many researchers. These studies were especially performed on bicrystals with well-defined GBs [ 1, 2 ]. I. Chesser & E.A Holm Understanding the anomalous thermal behavior of sigma 3 grain boundaries in a variety of FCC metals [arXiv] A. Mangal & E.A. Holm Applied Machine Learning to predict stress hotspots I: Face Centered Cubic Materials [ arXiv ].


Share this book
You might also like
Stable Internal Fixation in Maxillofacial Bone Surgery

Stable Internal Fixation in Maxillofacial Bone Surgery

Freeport LNG Project

Freeport LNG Project

Catalogue of pictures by old masters, the property of a gentleman

Catalogue of pictures by old masters, the property of a gentleman

To Lhassa at last

To Lhassa at last

Descriptive catalogue of fruit and ornamental trees, small fruits, vines, shrubs, roses, plants, etc

Descriptive catalogue of fruit and ornamental trees, small fruits, vines, shrubs, roses, plants, etc

effect of equipment structure on the creative thinking of young children in a problem solving situation

effect of equipment structure on the creative thinking of young children in a problem solving situation

guide to the principal sources for early American history (1600-1800) in the city of New York

guide to the principal sources for early American history (1600-1800) in the city of New York

Italy

Italy

Advanced synthesis and processing technology for materials

Advanced synthesis and processing technology for materials

Factors in daily physical activity related to calcaneal mineral density in men

Factors in daily physical activity related to calcaneal mineral density in men

romantic revolution in America, 1800-1860

romantic revolution in America, 1800-1860

Grant Morrison

Grant Morrison

Tan Chee Khoon, from village boy to Mr. Opposition

Tan Chee Khoon, from village boy to Mr. Opposition

Evolution of grain boundary character distributions in FCC and BCC materials by Peter Keng-Yu Lin Download PDF EPUB FB2

The Grain boundary character distribution (GBCD) in FCC low stacking fault energy materials susceptible to annealing twinning, showed a preference of x3" boundaries (where n =1,2 and 3).

The changes in the distribution of the CSL boundaries during microstructural evolution were found to be influenced by thermomechanical by: 4. The structures of grain boundaries were characterized within the framework of Coincidence Site Lattice (CSL) model using Orientation Imaging Microscopy (OIMspTM).

The Grain boundary character distribution (GBCD) in FCC low stacking fault energy materials susceptible to annealing twinning, showed a preference of Sigma 3spn boundaries (where n = 1, 2 and 3).Cited by: 4. The impact of grain boundary character distribution on soft magnetic properties of as-cast, deformed and recrystallized FeCoNiAl medium-entropy alloys (MEAs) with single face-centered cubic (FCC) phase was investigated.

Electron backscatter diffraction (EBSD) results show that the existence of a large number of random grain boundaries (%) and Σ3 boundary (%) is Cited by: 2. The microstructural and texture evolutions of as-cast AlCoCrFeNi eutectic high entropy alloy (EHEA) have been investigated in the course of thermom.

Abstract: The grain boundary energy anisotropy in BCC Fe-based polycrystals is considered. The correlation between the energy in BCC random grain boundaries and the distribution of grain boundary planes in the bulk was examined with a special attention on the presence of low index (low surface energy) planes in the internal surfaces.

In this comparative study, the grain boundary character distribution (GBCD) and stacking fault probability (P sf) of 90Cu10Ni alloys with different amounts of the rare earth (RE) element yttrium (Y) are results showed that the frequency of low-ΣCSL boundaries, especially the Σ3 twin boundaries, was significantly enhanced with increasing the Y addition.

The effect of texture on grain boundary character distribution (GBCD) in thermomechanically processed oxygen-free high-conductivity copper has been investigated. Copper samples were cold rolled to a reduction in thickness of 50% and then annealed for 60 min in the range of –°C.

In fcc materials, e.g., segregation is suppressed only at Σ=3 (the most close-packed) grain boundaries (as shown in Figs. 2b and c). A possible reason for our observed lack of segregation at other high-angle grain boundaries in Cu-Bi and Fe-P is that crystallography plays an even more important role than hitherto suspected and some high-angle.

The deformation behavior and microstructural evolution of ultrafine- (UFG) and fine-grained (FG) Cu during the dynamic tensile extrusion (DTE) process. The recrystallization-induced microstructural evolution is investigated in terms of grain size, grain boundary distribution, and the recrystallization induced softening as determined from micro.

Grain boundary character distribution (GBCD) and triple junction character distribution (TJCD) in a stainless steel cold rolled with the thickness reduction of 6% and then annealed at K.

@article{osti_, title = {Cavity evolution at grain boundaries as a function of radiation damage and thermal conditions in nanocrystalline nickel}, author = {Muntifering, Brittany and Blair, Sarah Jane and Gong, Cajer and Dunn, Aaron and Dingreville, Remi and Qu, Jianmin and Hattar, Khalid}, abstractNote = {Enhanced radiation tolerance of nanostructured metals is attributed to the high.

grain boundary engineering (GBE) or in other words the optimization of grain boundary character distribution (GBCD) which was proposed by Watanabe [9]. He stated that the CSL-GBs with ∑ value no>29 are special boundaries, and the overall properties of the material may be improved substantially if the frequency and spatial distributions of such.

A few detailed studies on microstructural evolution in deformed face centre cubic (FCC) and grain boundary character distribution in ultra-fine grained (ECAP) nickel. Evolution of Grain. Abstract.

In general, annealing twins (Σ3 boundaries) are induced in face-centered cubic metals by thermal–mechanical processes.

We report on the Σ3 boundary-induced plasticity enhancement of pure iron treated by a pulsed electric current subject to its allotropic transformation of α → γ → behavior is attributed to an increased amount of Σ3 boundaries with the grain-boundary. Grain boundary character distribution (GBCD) of cold-rolled CoCrFeMnNi high-entropy alloy during ℃ annealing-induced recrystallization were investigated by means of electron back scatter.

The parameterization of the distribution in Figure 3 reflects only the misorientation angle. To also show the distribution of misorientation axes, λ(Δg), averaged over all boundaries planes, Rodrigues-Frank space was employed (Figure 4).The Rodrigues vector (Δg) is a unique vector having a direction parallel to the common axis of misorientation and its magnitude is proportional to the.

Geometry of grain boundaries. (a) The axis–angle representation (w, a) of the rotation and the boundary plane unit normal vectors n 1 and n 2 in each grain's reference frame. This paper investigated the effect of deformation temperatures on microstructure evolution and grain boundary character distribution (GBCD) of Fe%Ni Invar alloy during hot compression tests.

The isothermal hot deformation tests were carried out in a temperature range of °C and a strain rate of s−1. The grain boundary character distribution was based on the. Grain growth in unalloyed nanocrystalline tungsten transpires through a discontinuous process at temperatures up to °C, which is coupled to an allotropic phase transformation of metastable β-tungsten with the A cubic structure to stable body centered cubic (BCC) α-tungsten.

Grain boundary character distribution of commercially pure Zr (Zr) was studied by experiment in conjunction with the Monte-Carlo computer simulation.

Hallberg H Influence of anisotropic grain boundary properties on the evolution of grain boundary character distribution during grain growth—a 2D level set study Modelling Simul. Mater. Sci. Eng. 22 IOPscience Google Scholar.7 Why are grain boundaries interesting, important?

• Grain boundaries vary a great deal in their characteristics (energy, mobility, chemistry). • Many properties of a material - and also processes of microstructural evolution - depend on the nature of the grain boundaries. • Materials can be made to have good or bad.