The Distribution of Grain Boundary Planes in Interstitial Free Steel

Beladi, Hossein; Rohrer, Gregory S.

doi:10.1007/s11661-012-1393-0

Cited by 65 publications

(35 citation statements)

References 26 publications

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“…The average distribution of these three macroscopic parameters (x, r ˘ ) of grain boundary is again inferred to be of random type. Similar results of such random distribution have been reported in fully ferritic microstructures [27][28][29].…”

Section: Rotation Axis Distributionsupporting

confidence: 88%

Five-Parameter Grain Boundary Determination in Annealed Ferrite Structure Using Electron Backscatter Diffraction and Serial Sectioning Technique

Dash

Karthikeyan

Saroja

2016

Trans Indian Inst Met

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The SEM/electron back scattered diffraction and serial sectioning procedure have been used to study the five parameter description of grain boundaries in a polygonal ferrite microstructure of 9Cr-1Mo steel. A routine has been evolved to correlate the successive images of a selected region and determine the grain boundary plane morphology. The relative misorientation of the crystallites, in terms of misorientation angle-axis (x,r ˘ ) , the grain boundary inclination angles [azimuth (c) and polar (b) angles], and the crystallographic description of the two meeting planes have been studied and compared with random distribution. The low-angle boundaries are found to be persistently present in higher amounts after the grain growth induced by extended annealing.

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Section: Rotation Axis Distributionsupporting

confidence: 88%

Five-Parameter Grain Boundary Determination in Annealed Ferrite Structure Using Electron Backscatter Diffraction and Serial Sectioning Technique

Dash

Karthikeyan

Saroja

2016

Trans Indian Inst Met

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“…[3,4] The purpose of this paper is to review and compare the grain boundary character distributions of four microstructures processed in different ways. These distributions have been previously reported in different contexts, [3,5,6] but here we focus on the role of the transformation path on the grain boundary character distribution.…”

Section: Introductionmentioning

confidence: 52%

“…Here, the typical c-fiber texture was observed having a texture strength of~12 MRD (Figure 4(c)). It has been [3], [5], and [6], respectively.…”

Section: A the Role Of Thermomechanical Route On The Grain Boundary mentioning

confidence: 99%

The Role of Thermomechanical Routes on the Distribution of Grain Boundary and Interface Plane Orientations in Transformed Microstructures

Beladi

Rohrer

2016

Metall Mater Trans A

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In the current study, a series of thermomechanical routes were used to produce different microstructures (i.e., ferrite and martensite) in low-carbon low alloy steels. The five-parameter grain boundary character distribution was measured for all microstructures. The thermomechanical processing route altered the texture of the fully ferritic microstructure and significantly influenced the anisotropy of the grain boundary character distribution. Generally, the population of (111) planes increased with an increase in the c-fiber texture for the ferritic microstructure, but it did not change the shape of the grain boundary plane distribution at specific misorientations. The most commonly observed boundaries in the fully ferritic structures produced through different routes were {112} symmetric tilt boundaries with the R3 = 60 deg/[111] misorientation; this boundary also had a low energy. However, the grain boundary plane distribution was significantly changed by the phase transformation path (i.e., ferrite vs martensite) for a given misorientation. In the martensitic steel, the most populous R3 boundary was the {110} symmetric tilt boundary. This results from the crystallographic constraints associated with the shear transformation (i.e., martensite) rather than the low-energy interface that dominates in the diffusional phase transformation (i.e., ferrite).

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“…Recent experimental characterization of steels has shown that several of these symmetric tilt grain boundaries are observed at a concentration higher than random grain boundaries. 64,65 For example, Beladi and Rollett quantified that the R3(112) symmetric tilt grain boundary is observed at >10 multiples of a random distribution (MRD) of grain boundaries, 64,65 i.e., much larger than would be expected. While the experimental observation of h100i symmetric tilt grain boundaries (R5, R13 GBs) is below 1 MRD, these grain boundaries are commonly used in DFT studies due to the low periodic distances required in the grain boundary plane.…”

Section: Methodology a Grain Boundariesmentioning

confidence: 99%

Binding of HenV clusters to α-Fe grain boundaries

Tschopp

Gao

Solanki³

2014

Journal of Applied Physics

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Articles you may be interested inBinding energetics of substitutional and interstitial helium and di-helium defects with grain boundary structure in - The objective of this research is to explore the formation/binding energetics and length scales associated with the interaction between He n V clusters and grain boundaries in bcc a-Fe. In this work, we calculated formation/binding energies for 1-8 He atoms in a monovacancy at all potential grain boundary (GB) sites within 15 Å of the ten grain boundaries selected (122106 simulations total). The present results provide detailed information about the interaction energies and length scales of 1-8 He atoms with grain boundaries for the structures examined. A number of interesting new findings emerge from the present study. First, the R3(112) "twin" GB has significantly lower binding energies for all He n V clusters than all other boundaries in this study. For all grain boundary sites, the effect of the local environment surrounding each site on the He n V formation and binding energies decreases with an increasing number of He atoms in the He n V cluster. Based on the calculated dataset, we formulated a model to capture the evolution of the formation and binding energy of He n V clusters as a function of distance from the GB center, utilizing only constants related to the maximum binding energy and the length scale. V C 2014 AIP Publishing LLC.

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The Distribution of Grain Boundary Planes in Interstitial Free Steel

Cited by 65 publications

References 26 publications

Five-Parameter Grain Boundary Determination in Annealed Ferrite Structure Using Electron Backscatter Diffraction and Serial Sectioning Technique

Five-Parameter Grain Boundary Determination in Annealed Ferrite Structure Using Electron Backscatter Diffraction and Serial Sectioning Technique

The Role of Thermomechanical Routes on the Distribution of Grain Boundary and Interface Plane Orientations in Transformed Microstructures

Binding of HenV clusters to α-Fe grain boundaries

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