scholarly journals X-Ray Diffraction Texture Analysis of Uranium Alloy Fuel PLN-5527 R0

2018 ◽  
Author(s):  
Douglas L. Porter ◽  
Kevin R. Tolman
Keyword(s):  
Texture Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uranium Alloy

scholarly journals Spatially Resolved Forming Mechanisms Detection in Single Point Incremental Forming Using Synchrotron Based Texture Analysis

2021 ◽  
Author(s):  
Mateus Dobecki ◽  
Alexander Poeche ◽  
Walter Reimers
Keyword(s):  
Texture Analysis ◽  
Incremental Forming ◽  
Single Point ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Forming Mechanism ◽  
Spatially Resolved ◽  
Step Down ◽  
Stress States

AbstractDespite the ongoing success of understanding the deformation states in sheets manufactured by single-point incremental forming (SPIF), the unawareness of the spatially resolved influence of the forming mechanisms on the residual stress states of incrementally formed sheet metal parts impedes their application-optimized use. In this study, a well-founded experimental proof of the occurring forming mechanisms shear, bending and stretching is presented using spatially resolved, high-energy synchrotron x-ray diffraction-based texture analysis in transmission mode. The measuring method allows even near-surface areas to be examined without any impairment of microstructural influences due to tribological reactions. The depth-resolved texture evolution for different sets of forming parameters offers insights into the forming mechanisms acting in SPIF. Therefore, the forming mechanisms are triggered explicitly by adjusting the vertical step-down increment Δz for groove, plate and truncated cone geometries. The texture analysis reveals that the process parameters and the specimen geometries used lead to characteristic changes in the crystallites’ orientation distribution in the formed parts due to plastic deformation. These forming-induced reorientations of the crystallites could be assigned to the forming mechanisms by means of defined reference states. It was found that for groove, plate and truncated cone geometries, a decreasing magnitude of step-down increments leads to a more pronounced shear deformation, which causes an increasing work hardening especially at the tool contact area of the formed parts. Larger step-down increments, on the other hand, induce a greater bending deformation. The plastic deformation by bending leads to a complex stress field that involves alternating residual tensile stresses on the tool and residual compressive stresses on the tool-averted side incrementally formed sheets. The present study demonstrates the potential of high-energy synchrotron x-ray diffraction for the spatially resolved forming mechanism research in SPIF. Controlling the residual stress states by optimizing the process parameters necessitates knowledge of the fundamental forming mechanism action.

Quantitative Texture Analysis of Electrodeposited Line Patterns

2005 ◽  
Vol 495-497 ◽  
pp. 1455-1460 ◽  
Author(s):  
Karen Pantleon ◽  
Marcel A.J. Somers
Keyword(s):  
Experimental Evidence ◽  
Texture Analysis ◽  
Electrochemical Deposition ◽  
X Ray Diffraction ◽  
Orientation Relation ◽  
Free Standing ◽  
X Ray ◽  
Substrate Layer ◽  
Line Patterns

Free-standing line patterns of Cu and Ni were manufactured by electrochemical deposition into lithographically prepared patterns. Electrodeposition was carried out on top of a highly <111> oriented Au-layer physically vapor deposited on glass. Quantitative texture analysis carried out by means of X-ray diffraction for both the substrate layer and the electrodeposits yielded experimental evidence for epitaxy between Cu and Au. An orientation relation between film and substrate was discussed with respect to various concepts of epitaxy. While the conventional mode of epitaxy fails for the Cu-Au-system, it is shown that the experimentally observed orientation relation can be conceived as a 30º rotation of Cu (111) grown on Au (111) (rotational epitaxy).

EBSD Analysis of SmCoFeCuZr Alloys

2016 ◽  
Vol 869 ◽  
pp. 608-613
Author(s):  
Sergio Antonio Romero ◽  
Christien G. Hauegen ◽  
Fernando J.G. Landgraf ◽  
Marcos Flavio de Campos
Keyword(s):  
Texture Analysis ◽  
Crystalline Structure ◽  
Ebsd Analysis ◽  
Phase Identification ◽  
X Ray Diffraction ◽  
Complementary Technique ◽  
X Ray ◽  
Kikuchi Lines

In the present study, EBSD was used for the characterization of alloys used for production of SmFeCoCuZr magnets. EBSD is adequate for texture analysis, but may give misleading results for phase identification. EBSD is not suitable for identifying phases with very similar crystalline structure, especially when the phases are crystallographically coherent, due to the superposition of Kikuchi lines. As consequence, for phase identification EBSD should be considered a complementary technique to other methods, as for example x-ray diffraction (XRD).

2D Magnetic Texture Analysis of Co–Cu Films

2017 ◽  
Vol 72 (5) ◽  
pp. 449-455 ◽  
Author(s):  
Mehmet Bayirli ◽  
Oznur Karaagac ◽  
Hakan Kockar ◽  
Mursel Alper
Keyword(s):  
Fourier Series ◽  
Texture Analysis ◽  
Easy Axis ◽  
Hysteresis Loops ◽  
X Ray Diffraction ◽  
Axis Orientation ◽  
Magnetic Texture ◽  
X Ray ◽  
Cu Films ◽  
Magnetic Easy Axis

AbstractThe magnetic textures for the produced magnetic materials are important concepts in accordance with technical applications. Therefore, the aim of this article is to determine 2D magnetic textures of electrodeposited Co–Cu films by the measurement of hysteresis loops at the incremented angles. For that, Co–Cu films were deposited with different Co2+ in the electrolyte. In addition, the easy-axis orientation in the films from the squareness values of the angles, Mp(β) obtained by the hysteresis loops have been numerically studied using the Fourier series analysis. The differences observed in the magnetic easy-axis distributions were attributed to changes of the incorporation of Co in the films with the change of Co2+ in the electrolyte. The coefficients of Fourier series (A0 and A2n ) were also computed for 2D films. It is seen that a systematic and small decrease in A0 and an obvious decrease in A2n (n=1) were observed with increasing incorporated Co in the films. Results imply that interactions cause slightly demagnetization effect accordance with higher incorporation of Co in the films. Furthermore, the crystal structure of the Co–Cu films analysed by X-ray diffraction revealed that the films have dominantly face-centred cubic structure. Film contents analysed by energy-dispersive X-ray spectroscopy and film morphologies observed by scanning electron microscope also support the magnetic texture analysis results found by numerical computation.

X-ray diffraction texture analysis of cylindrical samples

1999 ◽  
Vol 32 (3) ◽  
pp. 387-392 ◽  
Author(s):  
R. Guillén ◽  
C. Cossu ◽  
T. Jacquot ◽  
M. François ◽  
B. Bourniquel
Keyword(s):  
Texture Analysis ◽  
Incident Beam ◽  
Sample Surface ◽  
Spot Size ◽  
X Ray Diffraction ◽  
Beam Spot ◽  
X Ray ◽  
Beam Spot Size ◽  
Cylindrical Samples ◽  
Geometric Effects

The effect of the curvature of the sample surface on X-ray diffraction has been studied. A theoretical model, based on a ray-tracing method, has been developed to take into account the geometric effects which modify the collected intensities. The model enables alignment corrections for the sample and the incident beam, in relation to the goniometer centre. This can be achieved by comparing experimental normalized intensities for a zero tilt angle (ψ = 0°) to the normalized intensities calculated by the model. The texture analysis of a zircaloy-4 tube (with a 9.5 mm diameter and an incident-beam spot size of 1.2 mm diameter) confirms the validity of the results.

scholarly journals Characterizing the microstructural anisotropy of fine-grained phyllosilicate-rich rocks

2021 ◽  
Vol 1 ◽  
pp. 69-70
Author(s):  
Rebecca Kühn ◽  
Michael Stipp ◽  
Bernd Leiss
Keyword(s):  
Physical Properties ◽  
Texture Analysis ◽  
High Energy ◽  
Preferred Orientation ◽  
Low Grade ◽  
X Ray Diffraction ◽  
Crystallographic Preferred Orientation ◽  
X Ray ◽  
Fine Grained ◽  
Microstructural Anisotropy

Abstract. The physical properties of claystones, shales, and slates are highly dependent on the alignment of phyllosilicate minerals. With increasing overburdening, the shape and the crystallographic preferred orientation of these minerals are affected by uniaxial shortening as well as tectonic processes including recrystallization under elevated pressure and temperature conditions. The microstructural anisotropy expressed mainly by the alignment of phyllosilicates significantly predetermines the orientation of fractures, hence the shear strength and stability of clay-rich sediments and rocks. A quantitative analysis of phyllosilicate alignment is therefore essential to evaluate the properties and the mechanical behavior of these rocks. This can be carried out by analyzing the crystallographic preferred orientation (texture). Although texture analysis is a common tool in geosciences, it becomes more difficult in fine-grained rocks owing to for example particle size, heterogeneity, the polyphase composition, and difficulties in sample preparation. Methods such as electron backscatter diffraction, neutron diffraction, or laboratory X-ray diffraction are restricted with respect to preparation artifacts, sampling size and statistics, water content, etc. To overcome these issues, we successfully apply high-energy X-ray diffraction as available at synchrotron research facilities, e.g., at the German Electron Synchrotron Facility (DESY) in Hamburg, Germany, or the European Synchrotron Research Facility (ESRF) in Grenoble, France. In combination with Rietveld refinement we analyze the bulk texture of phyllosilicate-rich rocks. Here we present the results of texture analysis from a wide range of these rocks: Pleistocene poorly consolidated mud (rocks), affected only by sedimentation and burial; more highly consolidated but tectonically largely unaffected Jurassic claystone from the Opalinus Formation of the Swabian Alb; Carboniferous shales from the Harz mountains representing low-grade metamorphic and deformed rocks. Our methodical approach to quantifying the microstructural anisotropy using texture analysis in fine-grained rocks allows for the quantification of physical properties resulting from the alignment of phyllosilicates. Furthermore, it enables the prediction of direction-dependent mechanical strength, which is crucial for the establishment of long-term repositories for radioactive waste in shales and claystones.

Quantitative Texture Analysis from X-ray Diffraction Spectra

1997 ◽  
Vol 30 (4) ◽  
pp. 443-448 ◽  
Author(s):  
Y. D. Wang ◽  
L. Zuo ◽  
Z. D. Liang ◽  
C. Laruelle ◽  
A. Vadon ◽  
...  
Keyword(s):  
Distribution Function ◽  
Texture Analysis ◽  
Orientation Distribution Function ◽  
Diffraction Data ◽  
Polycrystalline Material ◽  
Orientation Distribution ◽  
New Method ◽  
X Ray Diffraction ◽  
X Ray

A method to obtain the orientation distribution function (ODF) of a polycrystalline material directly from X-ray diffraction spectra is presented. It uses the maximum-texture-entropy assumption to reduce the diffraction data needed for the ODF analysis. The validity of this new method is illustrated through two model examples.

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