Neutron Diffraction Texture Analysis of Grain-Oriented Steel Sheets

2005 ◽  
Vol 105 ◽  
pp. 175-180 ◽  
Author(s):  
Stanislav Vratislav ◽  
Maja Dlouhá ◽  
Ladislav Kalvoda
Keyword(s):  
Neutron Diffraction ◽  
Cold Rolling ◽  
Texture Analysis ◽  
Volume Fraction ◽  
Rolling Direction ◽  
Orthorhombic Symmetry ◽  
Automatic Data ◽  
Cubic Symmetry ◽  
Steel Sheets ◽  
Pole Figures

Our laboratory developed and tested experimental and calculation techniques for quantitative texture analysis based on the ODF combined with the diffraction of thermal neutrons. In our work the texture of the Fe-3%Si sheets was investigated after different stages of their processing, i.e. hot-rolled strips, first cold rolling, first inter-annealing, second cold rolling, second annealing and secondary recrystallisation. The texture experiments were carried out on the KSN-2 diffractometer which is equipped with the TG-1 texture goniometer with automatic data collection for transmission and reflection geometry. TODFND (the cubic symmetry of the crystals and orthorhombic symmetry of the specimen) was used and the ODF values were obtained together with all texture characteristics (pole figures, inverse pole figures, ODF - f (g) values, fibre texture with <110> and <001> axis parallel to rolling direction, parameters of the ideal orientations (HKL)<uvw>, texture index J, volume fraction coefficient f. The comparison of the texture parameters of the six samples with the different technologic history is given and the magnetic anisotropy of all measured samples was determined by means of the quantitative texture analysis (ODF-the matrix Cl nµ) for all samples. Results achieved in our study confirm that the quantitative texture analysis in connection with neutron diffraction can help to improve the technology of the preparation of oriented magnetic steel sheets.

scholarly journals Texture Analysis of a Zinc Layer on a Steel Substrate Using Neutron Diffraction

1993 ◽  
Vol 21 (2-3) ◽  
pp. 71-78
Author(s):  
H.-G. Brokmeier
Keyword(s):  
Distribution Function ◽  
Neutron Diffraction ◽  
Texture Analysis ◽  
Orientation Distribution Function ◽  
Steel Substrate ◽  
Orientation Distribution ◽  
Pole Figures ◽  
Iron And Zinc

This paper describes the application of neutron diffraction to investigate the texture of a zinc layer 8 μm in thickness. In a nondestructive way both the texture of the zinc layer as well as the texture of the steel substrate were studied. Therefore, pole figures of iron ((110), (200) and (211)) and of zinc ((0002), (101¯0), (101¯1); and (101¯3)/(112¯0)) were measured; additionally the orientation distribution function of iron and zinc were calculated.

Cold-rolling of Ti-rich TiAl polysynthetically twinned crystals

1990 ◽  
Vol 5 (3) ◽  
pp. 484-487 ◽  
Author(s):  
S. R. Nishitani ◽  
M. H. Oh ◽  
A. Nakamura ◽  
T. Fujiwara ◽  
M. Yamaguchi
Keyword(s):  
Cold Rolling ◽  
Shear Deformation ◽  
Surface Texture ◽  
Room Temperature ◽  
Stoichiometric Composition ◽  
Rolling Direction ◽  
Rolling Plane ◽  
Total Reduction ◽  
Pole Figures

Polysynthetically twinned crystals of TiAl with a nearly stoichiometric composition have been grown and rolled at room temperature. The maximum total reduction in thickness which is attainable without fracture depends on lamellae orientation with respect to the rolling plane and rolling direction. When specimens are oriented such that shear deformation parallel to the lamellar planes is operative during rolling and its operation causes lengthening of specimens, such specimens can be rolled up to about 50% reduction in thickness. The (111) pole figures are determined for the surface of specimens rolled to several different amounts of reduction, and the formation of surface texture is briefly discussed.

scholarly journals On the Use of Polycrystal and Individual Orientation Texture Analysis Methods for BCC Materials

1996 ◽  
Vol 25 (2-4) ◽  
pp. 109-120 ◽  
Author(s):  
I. V. Gervasyeva ◽  
B. K. Sokolov ◽  
A. K. Sbitnev
Keyword(s):  
Texture Analysis ◽  
Secondary Recrystallization ◽  
Recrystallization Process ◽  
Etch Pits ◽  
Discrete Method ◽  
Cubic Symmetry ◽  
X Ray ◽  
Harmonic Method ◽  
Pole Figures ◽  
Orientation Density

The reliability of the harmonic method of the ODF calculation from X-ray pole figures was estimated for cubic symmetry materials. For this purpose simulated textures with a preset scattering value of the components were used. Some examples using the Roe method to the study of the secondary recrystallization process in the Fe-3% Si alloy are given. The capabilities of the etch-pits methods as the simplest discrete method used to determine the orientation density are discussed.

On {h,1,1}, the Recrystallisation Texture of Heavily Cold Rolled BCC Steel

2004 ◽  
Vol 467-470 ◽  
pp. 269-274 ◽  
Author(s):  
Hotaka Homma ◽  
Shuichi Nakamura ◽  
Naoki Yoshinaga
Keyword(s):  
Grain Boundary ◽  
Cold Rolling ◽  
Single Crystal ◽  
Grain Boundaries ◽  
Rolling Direction ◽  
Experimental Results ◽  
Rolled Steel ◽  
Fibre Structure ◽  
Pole Figures ◽  
Cold Rolled

Heavily cold rolled BCC steel has been indicated to generate {411}<148> recrystallisation texture and its family orientations which might be represented as {h,1,1}<1/h,1,2>. As a-fibre structure, or RD//<011> texture is significantly developed during the cold rolling, it is naturally speculated to be the recrystallisation site of {h,1,1}<1/h,1,2> fibre. The present paper prompts to demonstrate the recrystallisation procedure by utilising EBSP-OIM analysis. The first demonstration was carried out with OIM analysis on partially recrystallised cold rolled steel. At the stage of 50% recrystallisation, only ND//<111> texture has appeared for the recrystallised area. {100}<011> - {211}<011> a-fibre remains as deformed structure, and several {h,1,1}<1/h,1,2> grains could be found at the grain boundaries. Therefore, a bi-crystal of {100}<011> was employed to simulate the irregular deformation at the grain boundary. After cold rolling, a warp toward the grain boundary was observed. Although the interior of the {100}<011> single crystal was hardly recrystallised, sharp {411}<148> texture was created along the grain boundary. In order to confirm the phenomenon, another experiment was carried out that a cold rolled {100}<011> single crystal was bent along the rolling direction and annealed. Very sharp {411}<148> recrystallisation texture was formed again at the bent perimeter. These experimental results lead us to conclude that the irregular strain was sufficiently piled at the grain boundary after the heavy deformation and generates {h,1,1}<1/h,1,2> texture. On {100} pole figures, the recrystallisation textures were equivalently scattered around three <100> poles, therefore the rotation relationship around <111> axes with the original orientation was suggested.

Quantitative texture analysis of a hydroxyapatite coatings plasma-sprayed on titanium substrates at different temperatures

2020 ◽  
Vol 86 (12) ◽  
pp. 23-31
Author(s):  
V. F. Shamray ◽  
V. N. Serebryany ◽  
A. S. Kolyanova ◽  
V. I. Kalita ◽  
V. S. Komlev ◽  
...  
Keyword(s):  
Texture Analysis ◽  
Room Temperature ◽  
Volume Fraction ◽  
Rietveld Method ◽  
Orientation Distribution ◽  
Hydroxyapatite Coatings ◽  
Spraying Parameters ◽  
Pole Figures ◽  
Different Temperatures ◽  
Plasma Sprayed

Artificial hydroxyapatite exhibits an excellent biocompatibility with tissues of human body. However, poor mechanical properties of hydroxyapatites and low reliability in wet environments restrict their use. These limitations can be overcome by applying the hydroxyapatite as a coating onto metallic implants. X-ray diffraction analysis (restoration of orientation distribution function from pole figures and the Rietveld method) and scanning electron microscopy have been used to study thick (~330 μm) plasma-sprayed hydroxyapatite coatings. The coatings were deposited onto Ti – 2Al – 1Mn alloy substrates, one of which was held at room temperature (20°C) whereas the other substrate was preheated to 550°C. The texture of the coating deposited on substrate held at room temperature is characterized by the (001)[510] orientation, the volume fraction of which is 0.08, while the coating deposited on preheated substrate has the (001)[410] orientation, the volume fraction of which is 0.10. Results of texture analysis are qualitatively supported by the Rietveld refinement data. The problem of the formation of basal texture in plasma-sprayed hydroxyapatite coatings is discussed in terms of quantitative texture analysis in relation to the differences in the substrate temperature and spraying parameters. It was concluded that the quantitative texture analysis is of importance for deeper understanding the effect of spraying parameters on the formation of hydroxyapatite coatings.

Magnetic Barkhausen Noise Characterization of the Recrystallization of a Non-Oriented Electrical Steel after Cold Rolling at Different Angles to the Hot Rolling Direction

2018 ◽  
Vol 941 ◽  
pp. 274-279
Author(s):  
You Liang He ◽  
Mehdi Mehdi ◽  
Erik J. Hilinski ◽  
Afsaneh Edrisy
Keyword(s):  
Magnetic Properties ◽  
Cold Rolling ◽  
Hot Rolling ◽  
Electrical Steel ◽  
Electron Backscatter Diffraction ◽  
Rolling Direction ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Final Annealing ◽  
Steel Sheets

Non-oriented electrical steel sheets are the most commonly used material for the manufacturing of magnetic cores for electric motors and generators. The microstructure and texture of the steel after final annealing have a significant effect on the magnetic properties of the lamination core. To investigate the effect of cold rolling and annealing on the magnetic properties of the steel sheets, a 0.9 wt% Si non-oriented electrical steel was cold rolled at different angles to the hot rolling direction (HRD) and annealed at various temperatures (600°C to 750°C) to produce dissimilar microstructures. The progress of recrystallization was characterized by electron backscatter diffraction (EBSD), and the magnetic response of the steel at various stages of recrystallization was evaluated by magnetic Barkhausen noise (MBN). A number of MBN parameters, e.g. the root mean square, the smoothed envelope, the peak, the full width at half maximum (FWHM) of the envelope, the time integral of the MBN signals and the MBN energy, were analyzed with respect to the fraction of recrystallization during annealing. The results show that cold rolling at different angles to the hot rolling direction induces various deformation microstructures and stored energies, which, in turn, lead to considerably different recrystallization behaviours during annealing. The difference in recrystallization of these materials is also reflected in the MBN parameters.

Evaluation of austenite volume fraction in TRIP steel sheets using neutron diffraction

2017 ◽  
Vol 127 ◽  
pp. 104-110 ◽  
Author(s):  
P.G. Xu ◽  
Y. Tomota ◽  
Y. Arakaki ◽  
S. Harjo ◽  
H. Sueyoshi
Keyword(s):  
Neutron Diffraction ◽  
Trip Steel ◽  
Volume Fraction ◽  
Steel Sheets

Study of Texture in Ultra Fine Grained Dual Phase Steel Sheets

2011 ◽  
Vol 702-703 ◽  
pp. 806-809
Author(s):  
Papa Rao Mondi ◽  
R. Madhavan ◽  
V. Subramanya Sarma ◽  
S. Sankaran
Keyword(s):  
Cold Rolling ◽  
Dual Phase Steel ◽  
Intercritical Annealing ◽  
Rolling Direction ◽  
Dual Phase ◽  
Fine Grained ◽  
Steel Sheets ◽  
Cold Rolling And Annealing ◽  
Nb Microalloyed Steel ◽  
Cold Rolled

Severe cold rolling and short intercritcal annealing is often used to produce ultra-fine grained ferrite and martensite dual phase steels. In this paper, microstructure and texture of Nb-microalloyed steel following cold rolling and short intercritical annealing is investigated. The results show that cold rolling and annealing resulted in ultra-fine grained dual phase steel consisted of polygonal ferrite in the range of ~1-2 μm in size. In cold rolled material, the texture components are γ fiber (//normal direction) and α fiber (//rolling direction). Partial recrystallization texture was observed following intercritical annealing.

scholarly journals Preferred Orientations of Mica Bearing Rocks Described by Texture Components

1996 ◽  
Vol 25 (2-4) ◽  
pp. 211-222 ◽  
Author(s):  
K. Helming ◽  
D. Schmidt ◽  
K. Ullemeyer
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Data ◽  
Basal Plane ◽  
Grain Shape ◽  
Volume Fraction ◽  
The Other ◽  
Pole Density ◽  
Neutron Diffraction Data ◽  
Density Measurements ◽  
Pole Figures

Up to now Texture investigations of phyllosilicates were restricted to pole density measurements of the (001) basal plane. Because of the tabular grain shape parallel to the basal plane an axial symmetry of the texture is assumed usually. This assumption was proved for four mica bearing samples by calculating the ODF from neutron diffraction data. Beside the mica-texture the textures of the other major fractions like quartz and feldspar were determined to detect correlation between them. The textures are explained by components. Each component is characterised by a preferred orientation or fibre axis, a corresponding spreading and an intensity Iʿ describing the volume fraction of all crystallites belonging to the component. The presented component method can be applied to any crystal symmetry and to polyphase materials with overlapped pole figures.

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