On the through-process texture evolution assessment in grain oriented Fe-3 wt% Si steel produced by a novel directional inoculation technique

AbstractA novel directional inoculation technique has been designed to cast thin slab ingots containing Goss (or near Goss) oriented components in the as cast microstructure under the combined effect of oriented nucleation and oriented growth. The same has been targeted so as to retain Goss orientations and simultaneously develop γ fiber components (ranging from {111}<$$1\overline{1}0$$ 1 1 ¯ 0 > to {111}<112>) during hot rolling. The designed scheme of directional inoculation achieved oriented nucleation by the effect of exogenously added soft magnetic inoculants under magnetic field and oriented growth by the effect of fast cooling rates prevailing in the mould. The choice of 65Fe–35Co (wt%) system as soft magnetic inoculants was made taking into account the similarity in crystal structure and lattice parameter. The chemically synthesized inoculants under the effect of external magnetic field during solidification were able to exhibit directional inoculation. Variation in the cast microstructure and microtexture by varying the extent of inoculant addition was studied by EBSD technique. The ingots cast under different conditions were subjected to a designed hot rolling schedule and the through process microstructural and microtextural evolution was assessed. It was observed that fine equiaxed grains with initial cube orientations in the as cast structure could lead to the most desirable microstructural as well as microtextural gradient in the hot band.

Download Full-text

Texture Evolution of Tertiary Oxide Scale during Steel Plate Finishing Hot Rolling Simulation Tests

Materials Science Forum ◽

10.4028/www.scientific.net/msf.550.557 ◽

2007 ◽

Vol 550 ◽

pp. 557-562 ◽

Cited By ~ 9

Author(s):

Lucia Suarez ◽

Roumen H. Petrov ◽

Leo Kestens ◽

M. Lamberigts ◽

Yvan Houbaert

Keyword(s):

Oxide Layer ◽

Hot Rolling ◽

Texture Evolution ◽

Deformation Behaviour ◽

Rolling Process ◽

Columnar Structure ◽

Protective Atmosphere ◽

Orientation Relationships ◽

Complex Deformation ◽

Ebsd Technique

Thin tertiary scale layers have been grown on ULC steel specimens under controlled conditions. After heating under a protective atmosphere (nitrogen), the samples have been oxidised in air for various oxidation times at 1050°C. These experiments are considered a quantitatively and qualitatively reasonable simulation of the scale formation and growth occurring before hot rolling. Immediately after controlled oxidation, some of the samples were subjected to plane strain compression, in order to simulate the finishing hot rolling process. This approach provided a better insight into the deformation behaviour of the tertiary oxide layer in the first hot rolling pass. The layers produced were examined under the SEM using the EBSD technique for texture characterisation and phase morphology determination. The texture of the deformed oxide scales, originally grown on ULC steel at 1050°C, was determined in order to achieve a better understanding of their complex deformation behaviour. This paper gives a first approach of the study of deformed oxides by EBSD. Strongly textured wustite grains with a clearly pronounced columnar structure were observed after oxidation at 1050°C. As the substrate deformation probably affects the oxide layer, orientation relationships between scale layer and substrate were observed. The detailed EBSD study reveals that the oxide layer can accommodate a significant amount of deformation. The oxide layers exhibit good adhesion to the substrate and remain homogeneous over the thickness after compression.

Download Full-text

Orientation Evolutions During Hot Rolling of Electrical Steel Containing Initial Columnar Grains

Materials Science Forum ◽

10.4028/www.scientific.net/msf.702-703.754 ◽

2011 ◽

Vol 702-703 ◽

pp. 754-757 ◽

Cited By ~ 1

Author(s):

Ping Yang ◽

Y.Y. Shao ◽

W.M. Mao ◽

Q.W. Jiang ◽

W.X. Jin

Keyword(s):

Grain Boundaries ◽

Hot Rolling ◽

Electrical Steel ◽

Texture Evolution ◽

Center Layer ◽

Different Types ◽

Columnar Grains ◽

The Difference ◽

Ebsd Technique ◽

Hot Rolled

The texture evolution in the surface and center layer of hot rolled electrical steel containing initial columnar grains with their <100> nearly along ND, RD and TD of sheets were determined by EBSD technique. The transition from Goss to Brass or Copper orientation in surface was analyzed. The difference in texture of center layers in these samples was compared. In particular, orientation evolutions within grains and at grain boundaries of different types of orientations were explored. The results are discussed in terms of the special alignments of grain boundaries among columnar grains.

Download Full-text

Texture evolution of Terfenol-D by solidification in a magnetic field

Journal of Applied Physics ◽

10.1063/1.2335663 ◽

2006 ◽

Vol 100 (5) ◽

pp. 053905 ◽

Cited By ~ 4

Author(s):

Peiran Deng ◽

Jianguo Li ◽

Zhenming Xu

Keyword(s):

Magnetic Field ◽

Texture Evolution

Download Full-text

Texture and Microstructure Evolution in Friction Stir Welded Cu-Al Sheets Characterized by EBSD

Materials Science Forum ◽

10.4028/www.scientific.net/msf.702-703.574 ◽

2011 ◽

Vol 702-703 ◽

pp. 574-577 ◽

Cited By ~ 3

Author(s):

Daniel Goran ◽

G. Ji ◽

M. N. Avettand-Fènoël ◽

R. Taillard

Keyword(s):

Microstructure Evolution ◽

Electron Backscatter Diffraction ◽

Texture Evolution ◽

Weld Interface ◽

Friction Stir ◽

Electron Backscatter ◽

Ebsd Technique ◽

Backscatter Diffraction

Texture and microstructure of FSW joined Al and Cu sheets were investigated by means of electron backscatter diffraction (EBSD) technique. The analysis has revealed a strong texture evolution on both sides of the weld interface as well as a very complex microstructure. Grains were found to be fully recrystallized on both sides of the weld and with different average diameters at different specific zones of the weld.

Download Full-text

STUDY OF THE TEXTURING IN BSCCO-AG TAPES THROUGH MAGNETIC MEASUREMENTS

International Journal of Modern Physics B ◽

10.1142/s0217979200003472 ◽

2000 ◽

Vol 14 (25n27) ◽

pp. 3159-3164

Author(s):

C. FERDEGHINI ◽

M. R. CIMBERLE ◽

G. GRASSO ◽

P. GUASCONI ◽

A. MALAGOLI ◽

...

Keyword(s):

Magnetic Field ◽

Critical Current Density ◽

Critical Current ◽

Current Density ◽

Magnetic Measurements ◽

Texture Evolution ◽

Rolling Direction ◽

Longitudinal Direction ◽

Magnetic Method ◽

Superconducting Compounds

We have developed a method that allows, by a simple set of magnetic measurements, to study the texturing of the grains inside a BSCCO-Ag tape. Because the texture is anisotropic we define the angle ϑ L that identifies the mean grain misalignment angle with respect to the tape surface in longitudinal direction (i.e. rolling direction) and the angle ϑ T in transverse direction. The technique is based on the assumption that, because of the very high anisotropy of the critical current density in BSCCO superconducting compounds, the magnetic moment is essentially generated by the current circulating in the a-b planes of the BSCCO grains. The different magnetisation cycles, measured when the orientation of the magnetic field with respect to the tape surface is changed, depend only on the grain orientation inside the tape, which determines the effective magnetic field component normal to the a-b planes of the grains. Here we present the texture evolution of the BSCCO grains inside silver sheated multifilamentary tape starting from the initial steps of the mechanical deformation up to the final heating stage. The results obtained from the magnetic method are compared with those obtained with other methods, i.e. X-ray diffraction and critical current density anisotropy. Also results obtained on samples prepared in different way will be presented.

Download Full-text

Study of Texture Evolution of Pure Magnesium during ECAE Using EBSD

Materials Science Forum ◽

10.4028/www.scientific.net/msf.584-586.343 ◽

2008 ◽

Vol 584-586 ◽

pp. 343-348 ◽

Cited By ~ 10

Author(s):

Somjeet Biswas ◽

Satyaveer Singh Dhinwal ◽

Ayan Bhowmik ◽

Satyam Suwas

Keyword(s):

Equal Channel Angular Extrusion ◽

Texture Evolution ◽

Orientation Distribution ◽

Fiber Texture ◽

Electron Back Scatter Diffraction ◽

Pure Magnesium ◽

Material Texture ◽

Two Temperatures ◽

Ebsd Technique ◽

Hot Rolled

Commercially Pure Magnesium initially hot rolled and having a basal texture was deformed by Equal Channel Angular Extrusion (ECAE). ECAE was carried out upto 8 passes in a 90° die following routes A and Bc through a processing sequence involving two temperatures, namely 523 and 473 K. Texture and microstructure formed were studied using electron back scatter diffraction (EBSD) technique. In addition to significant reduction in grain size, strong <0002> fiber texture inclined at an angle ~ 45o from the extrusion axis formed in the material. Texture was also analyzed by orientation distribution function (ODF) and compared vis-à-vis shear texture. A significant amount of dynamic recrystallization occurred during ECAE, which apparently did not influence texture.

Download Full-text

Elaboration, Structure and Mössbauer Spectroscopy of Nanostructured Fe100−xSix Powders Elaborated by Mechanical Alloying

SPIN ◽

10.1142/s2010324717500023 ◽

2017 ◽

Vol 07 (02) ◽

pp. 1750002 ◽

Cited By ~ 1

Author(s):

M. Hemmous ◽

A. Guittoum

Keyword(s):

Magnetic Field ◽

Solid Solution ◽

Mechanical Alloying ◽

Hyperfine Magnetic Field ◽

Lattice Parameter ◽

X Ray Diffraction ◽

X Ray ◽

Grain Sizes ◽

The Mean ◽

Xrd Studies

We have studied the effect of the silicon concentration on the structural and hyperfine properties of nanostructured Fe[Formula: see text]Six powders ([Formula: see text], 20, 25 and 30[Formula: see text]at.%) prepared by mechanical alloying. The X-ray diffraction (XRD) studies indicated that after 72[Formula: see text]h of milling, the solid solution bcc-[Formula: see text]-Fe(Si) is formed. The grain sizes, [Formula: see text]D[Formula: see text] (nm), decreases with increasing Si concentration and reaches a minimum value of 11[Formula: see text]nm. We have found that the lattice parameter decreases with increasing Si concentration. The changes in values are attributed to the substitutional dissolution of Si in Fe matrix. From the adjustment of Mössbauer spectra, we have shown that the mean hyperfine magnetic field, [Formula: see text]H[Formula: see text] (T), decreases with increasing Si concentration. The substitutional dependence of [Formula: see text]H[Formula: see text] (T) can be attributed to the effect of p electrons Si influencing electrons d of Fe.

Download Full-text