Grain Size Measurement in Experimental Co-Re-based Alloys to Study Grain Coarsening, Part I

2014 ◽  
Vol 51 (7) ◽  
pp. 499-513
Author(s):  
Andreas Klaus Czerny ◽  
Debashis Mukherji ◽  
Joachim Rösler
Keyword(s):  
Grain Size ◽  
Size Measurement ◽  
Grain Coarsening

Grain Size Measurement in Experimental Co-Re-based Alloys to Study Grain Coarsening

2014 ◽  
Vol 51 (8) ◽  
pp. 583-603 ◽  
Author(s):  
A. K. Czerny ◽  
D. Mukherji ◽  
J. Rösler
Keyword(s):  
Grain Size ◽  
Size Measurement ◽  
Grain Coarsening

Assessment of Some Methods for Grain Size Measurement

2013 ◽  
Vol 50 (7) ◽  
pp. 464-479 ◽  
Author(s):  
B. Markoli ◽  
I. Naglič ◽  
M. Prosenc ◽  
V. Kuhar
Keyword(s):  
Grain Size ◽  
Size Measurement

Implications of EBSD-based Grain Size Measurement on Structure-Property Correlations

2009 ◽  
Vol 46 (9) ◽  
pp. 469-482 ◽  
Author(s):  
Milo V. Kral ◽  
Daniel J. F. Drabble ◽  
Benjamin R. Gardiner ◽  
Peter C. Tait
Keyword(s):  
Grain Size ◽  
Size Measurement ◽  
Structure Property ◽  
Property Correlations

Uniformity of Grain Coarsening in Submicron Grained Al-Sc Alloy Containing Local Variations in Texture

2005 ◽  
Vol 495-497 ◽  
pp. 609-614
Author(s):  
Michael Ferry
Keyword(s):  
Grain Size ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Fine Particles ◽  
Volume Fraction ◽  
Marked Change ◽  
Grain Coarsening ◽  
Large Volume Fraction ◽  
Orientation Gradient ◽  
Distribution Boundary

The effect of fine particles on the uniformity of grain coarsening in a submicron grained Al-Sc alloy containing significant local variations in texture has been investigated using high resolution EBSD. The alloy was processed by severe plastic deformation and low temperature ageing to generate a fine-grained (0.8 µm diameter) microstructure containing either a dispersion of nanosized Al3Sc particles or a particle-free matrix. The initial processing generated a uniform grain size distribution, but the distribution of grain orientations was inhomogeneous with the microstructure containing colonies of grains consisting predominantly of either HAGBs or LAGBs with the latter possessing orientation gradients of up to 10 o/µm. Despite the marked differences in boundary character between these regions, the alloy undergoes slow and uniform grain coarsening during annealing at temperatures up to 500 oC with no marked change in the grain size distribution, boundary distribution and texture. A model of grain coarsening that takes into account the influence of fine particles on the kinetics of grain growth within an orientation gradient is outlined. The model predicts that a large volume fraction of fine particles (large f/r-value) tends to homogenize the overall rate of grain coarsening despite the presence of orientation gradients in the microstructure.

Grain size measurement in optical microstructure using support vector regression

Optik ◽  
2017 ◽  
Vol 138 ◽  
pp. 320-327 ◽  
Author(s):  
Gajalakshmi K. ◽  
Palanivel S. ◽  
Nalini N.J. ◽  
Saravanan S. ◽  
Raghukandan K.
Keyword(s):  
Grain Size ◽  
Support Vector Regression ◽  
Support Vector ◽  
Size Measurement ◽  
Optical Microstructure

scholarly journals Crystallography of grain refinement in cast zinc–copper alloys

2015 ◽  
Vol 48 (3) ◽  
pp. 890-900 ◽  
Author(s):  
Zhilin Liu ◽  
Dong Qiu ◽  
Feng Wang ◽  
John A. Taylor ◽  
Mingxing Zhang
Keyword(s):  
Grain Size ◽  
Grain Refinement ◽  
Copper Alloys ◽  
Diffraction Method ◽  
Electron Backscattered Diffraction ◽  
Grain Coarsening ◽  
Cu Content ◽  
Edge Matching ◽  
Average Grain Size ◽  
Cast Alloys

Adding the peritectic forming element Cu effectively reduced the average grain size of cast Zn by over 85%. At a specified cast condition, the smallest grain size was obtained at 2 wt% Cu addition. A further increase in Cu content led to grain coarsening in the cast Zn–Cu alloys. Although the solute effect of Cu was predominately responsible for the grain refinement through restriction of the grain growth, it was found that the variation of grain size is also closely related to the formation of the pro-peritectic phase, ∊-CuZn4. Crystallographic calculations using the edge-to-edge matching model showed low interatomic misfit and interplanar mismatch between Zn and the ∊-CuZn4phase. In addition, a reproducible h.c.p.–h.c.p. (h.c.p. denotes hexagonal close-packed) orientation relationship between Zn and the ∊-CuZn4particles (located within the Zn grain centres) was also experimentally determined using the electron backscattered diffraction method. This indicated the high potency of the pro-peritectic ∊-CuZn4particles as effective heterogeneous nucleation sites for η-Zn, which further refined the Zn grains. However, when the Cu content was over 2.0 wt%, formation of large ∊-CuZn4particles resulted in grain coarsening of the cast alloys.

Center Guided and Connectivity-Preserving Network for Grain Size Measurement

2021 ◽  
pp. 1-1
Author(s):  
Han Yu ◽  
Erfeng Shang ◽  
Xingjie Li ◽  
Huasheng Xie ◽  
Zhi Zhu ◽  
...  
Keyword(s):  
Grain Size ◽  
Size Measurement

Grain Growth Control in Grain Boundary Engineered Microstructures

2012 ◽  
Vol 715-716 ◽  
pp. 103-108 ◽  
Author(s):  
Valerie Randle ◽  
Mark Coleman
Keyword(s):  
Grain Size ◽  
Grain Boundary ◽  
Stainless Steels ◽  
Growth Control ◽  
Austenitic Stainless Steels ◽  
Grain Boundary Engineering ◽  
Size Measurement ◽  
Annealing Twins ◽  
And Control ◽  
Measurement And Control

Grain boundary engineering (GBE) to promote degradation-resistant interfaces in the microstructure usually requires that the grain size remains small so that strength is not compromised. Aspects of grain size measurement and control will be reviewed and discussed for a variety of GBE materials such as copper, nickel, nickel-based alloys and austenitic stainless steels, particularly in the light of the high proportion of annealing twins that constitute the GBE microstructure.

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