scholarly journals Assessment of Dislocation Density by Various Techniques in Cold Rolled 1050 Aluminum Alloy

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1571
Author(s):  
Jurij J. Sidor ◽  
Purnima Chakravarty ◽  
János Gy. Bátorfi ◽  
Péter Nagy ◽  
Qingge Xie ◽  
...  
Keyword(s):  
Dislocation Density ◽  
Profile Analysis ◽  
Simulated Data ◽  
Al Alloy ◽  
Line Profile Analysis ◽  
Continuous Increase ◽  
Diffraction Line Profile ◽  
Cold Rolled ◽  
1050 Aluminum Alloy ◽  
Numerical Approaches

This study examines the evolution of dislocation density in cold rolled 1050 Al alloy. Various techniques such as numerical approaches, indentation techniques, X-ray diffraction line profile analysis, and electron backscattering diffraction were employed for the characterization of the deformed state. These methods allowed us to determine the nature of the evolution of the dislocation substructure during cold rolling. The investigated material was subjected to thickness reductions varying from 5% to 47%, which resulted in a continuous increase in hardness while the estimated dislocation density showed a tendency towards a less intense increase after a ~30% straining level. The numerical approaches employed, such as the Kubin–Estrin and a modified version of this model, are capable of ensuring a reasonable estimation of dislocation density at low and moderate deformation levels (~5–30%), while the discrepancy between the measured and simulated data is negligible when the material has been exposed to more severe rolling reductions.

Application of the Nes Model for Static Recovery of the Dislocation Density in Cold Rolled AA6XXX

2014 ◽  
Vol 794-796 ◽  
pp. 605-610 ◽  
Author(s):  
Alex Penlington ◽  
Bradley Diak ◽  
Hai Ou Jin
Keyword(s):  
Dislocation Density ◽  
Profile Analysis ◽  
Model Fit ◽  
Line Profile Analysis ◽  
Static Recovery ◽  
Lateral Drift ◽  
Series Aluminum Alloy ◽  
Cold Rolled ◽  
6Xxx Series ◽  
Kinetics Of

An experimental 6XXX series aluminum alloy, Al-0.4Mg-1.2Si-0.49Cu-0.14Mn-0.2Fe(wt.%), was cold rolled 73% and the kinetics of its static recovery studied isochronally between 80 to 350°C, and isothermally at 175 and 205°C. Typical recovery is described by an extrinsic property such as yield stress, however, this study utilized the intrinsic dislocation density extracted from x-ray line profile analysis using a modified Williamson-Hall analysis. The static recovery of dislocation density was fit to the models of Nes [Acta Metall. Mater. 43 (1995) 2189–2207], suggesting that recovery is controlled by the migration of jogged screw dislocations assuming no lateral drift during annealing. The model fit of isothermal annealing at 175°C and 205°C yields activation energies of 0.99 and 1.7 eV/at., respectively. The change in energies can be correlated to an observed change in lattice strain with recovery.

Line-Profile Analysis Combined with Texture Analysis for Characterizing Dislocation Distribution in Texture Components of Cold-Rolled Copper Sheets

2016 ◽  
Vol 35 (7) ◽  
pp. 705-713 ◽  
Author(s):  
Kozue Satoh ◽  
Shigeo Sato ◽  
Kenta Yamanaka ◽  
Shigeru Suzuki ◽  
Akihiko Chiba ◽  
...  
Keyword(s):  
Dislocation Density ◽  
Texture Analysis ◽  
Line Profile ◽  
Texture Component ◽  
Profile Analysis ◽  
Line Profile Analysis ◽  
X Ray Diffraction ◽  
Dislocation Densities ◽  
Cold Rolled ◽  
The Individual

AbstractWe described a newly developed characterization technique that dislocation density could be individually determined for each texture component of plastically deformed metals by combining the line-profile analysis with the texture analysis by using X-ray diffraction. This method was applied to major texture components of cube, copper, and brass evolved in cold-rolled copper sheets. The Warren–Averbach procedure using two diffraction peaks was used for estimating the dislocation density. An increase in the dislocation density with the rolling reduction was evaluated for individual texture components. Although the individual texture components underwent the different slip paths, the dislocation densities in these texture components were almost comparable; however, the non-texture component was shown to have a higher dislocation density than the texture components. The recovery and recrystallization proceeded preferentially in the non-texture component.

Distributions of Domain Size, Lattice Distortion and Dislocation Density in Tubes of Zr-Based Alloys Studied by a Method Combining X-Ray Line Profile Analysis with Texture Measurements

2004 ◽  
Vol 443-444 ◽  
pp. 255-258 ◽  
Author(s):  
Yuriy Perlovich ◽  
Margarita Isaenkova
Keyword(s):  
Dislocation Density ◽  
Lattice Distortion ◽  
Profile Analysis ◽  
Domain Size ◽  
Line Profile Analysis ◽  
Ray Method ◽  
Texture Measurement ◽  
X Ray ◽  
Pole Figures ◽  
Line Analysis

The distributions of substructure parameters for tubes of Zr-based alloys were constructed by use of the X-ray method of Generalized Pole Figures, combining X-ray line analysis and texture measurement. Obtained distributions cover α-Zr crystallites of all orientations and give the fullest description of substructure features of the studied tubes. The interconnection of different substructure parameters are analyzed.

Defect Structures in Neutron Irradiated 6H-SiC Studied by X-Ray Diffraction Line Profile Analysis

2000 ◽  
Vol 640 ◽  
Author(s):  
C. Seitz ◽  
A. Magerl ◽  
R. Hock ◽  
H. Heissenstein ◽  
R. Helbig
Keyword(s):  
Line Profile ◽  
Correlation Length ◽  
Defect Structure ◽  
Profile Analysis ◽  
Line Profile Analysis ◽  
Defect Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Annealing Temperatures ◽  
Diffraction Line Profile

ABSTRACTWe have investigated by x-ray diffraction defect structures in 6H-SiC after neutron irradiation with different fluences and followed by different annealing procedures. An interpretation along a model of Klimanek [1, 4–6] shows, that higher fluences lead to a stronger than linear reduction of the correlation length, whereas higher annealing temperatures correlate with a better recovery of the correlation length. In addition defects of 1st kind created by irradiation are reduced by annealing. We find that annealing changes the character of the defects and it accentuates a defect structure already present in the original samples.

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