Determination of microtexture of initial stages of secondary recrystallisation in Fe–3 wt-%Si by etch pitting

Böttcher, Andreas; Gerber, Thorsten; Lücke, K.

doi:10.1179/026708392790169911

Cited by 17 publications

(5 citation statements)

References 3 publications

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“…There have been several theories [1][2][3][4][5] explaining the evolution of the {110}Ͻ001Ͼ Goss texture in 3 pct silicon steel. It has been recently shown that surface-energy-induced selective grain growth, final texture, and the consequent magnetic induction in the material are directly influenced by the interfacial segregation kinetics of sulfur.…”

Section: Nh Heomentioning

confidence: 99%

“…Note that Jackson et al's [3] discussions and conclusion were based on an organic model material, by which they mimicked the solidification behavior of metallic materials. Following this pioneering work, Xiao et al [4] proposed that remelting was responsible for the grain refinement in the Ni 70 Cu 30 alloy from deep undercoolings after observing the microstructure of alloys, from which they made a qualitative discussion. Following this pioneering work, Xiao et al [4] proposed that remelting was responsible for the grain refinement in the Ni 70 Cu 30 alloy from deep undercoolings after observing the microstructure of alloys, from which they made a qualitative discussion.…”

Section: Nh Heomentioning

confidence: 99%

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Effects of heating rate and hydrogen flow rate on magnetic induction and final grain texture of 3 pct silicon steel

Heo¹

2005

Metall Mater Trans A

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The breadth of application of this localized melting model must be considered carefully, however. In a recent review, [1] it is noted that solidus temperatures for 6XXX alloys have been measured at just above 640 °C, significantly above the ϳ620 °C level noted on the classical phase diagram (the classical 595 °C eutectic temperature, pertinent to compositions above ϳ2 pct Mg 2 Si, was not similarly challenged).Beyond this, our industrial collaborator had a target homogenization temperature of 560 °C, with likely excursions as high as 575 °C. We observed coarse, globular Mg 2 Si in structures exposed to both industrial and laboratory homogenization treatments in this range.Thus, it can be argued that the 590 °C globular particle coarsening occurs as much as 50 °C below the solidus. Moreover, we have observed large, globular Mg 2 Si particles after homogenization treatments 65 °C to 80 °C below the solidus. Such observations seem inconsistent with a localized melting model, and probably led to our minimal consideration of such.

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Section: Nh Heomentioning

confidence: 99%

Section: Nh Heomentioning

confidence: 99%

Effects of heating rate and hydrogen flow rate on magnetic induction and final grain texture of 3 pct silicon steel

Heo¹

2005

Metall Mater Trans A

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“…1,[9][10][11][12][13][14][15][16][17][18] The microstructure of the hot rolled plate, typically contains large and small grains and 'considerable' second phase particles. 1,3,4) The general understanding is that the large grains are formed by deformation and recrystallization of the ferritic grains, while the smaller grains are formed by transformation from austenite to ferrite.…”

Section: Introductionmentioning

confidence: 99%

Development of Cold Rolled Texture and Microstructure in a Hot Band Fe-3%Si Steel.

et al. 2002

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Hot band Fe-3%Si steel (CRGO or cold rolled grain oriented) was cold rolled with different reductions. The main objective of this study was an overall understanding of deformation texture and microstructure development. Hot band CRGO had a strong a-fiber (RD//͗110͘) texture. Cold reduction strengthened the a and g (ND//͗111͘) fibers, but weakened q (ND//͗100͘). All Taylor type deformation texture models were reasonably successful in predicting these bulk texture developments, and the Lamel model seems to be the 'best-fit' model, both in terms of a 'deviation' parameter (indicating differences between experimental and simulated values of idealized texture components) and a 'trend' parameter (indicating the relative change(s) in texture components with strain). The striking feature of the microstructure was the 'selective' appearance of grain interior strain localization's. These appeared at approximately 37°with the rolling direction (RD). Though 37°bands appeared only in orientations with high Taylor factor (M ), the absolute value of the Taylor factor alone, was not enough for the appearance of such bands. Negative textural softening or (dM/de) values, on the other hand, were always associated with the appearance of 37°bands, justifying or explaining their formation on the basis of a macroscopic plastic instability theory.KEY WORDS: cold rolling; texture; grain oriented electrical steel; microstructure; strain localizations.* 1 However excellent review articles on CRGO are perhaps limited, 4) as compared to forming grade steels. [23][24][25][26] a previous study of the present authors, it was suggested that the relative presence of the respective strain localization's may determine the frequency and 'perfection' of the primary recrystallized Goss grains, perhaps determining the effectiveness of the subsequent secondary recrystallization process. 11) A recent study in low carbon steel 34) has indicated that at least the 37°strain localization's are first generation micro bands forming on the so-called 'high Taylor Factor' orientations. How such strain localization's may evolve in a cold-deformed CRGO and if both 37°and 20°b ands are of the same nature and origin remains to be explored. Experimental MethodsA 200 kg Fe-3%Si steel ingot was hot rolled from 50 to 2.1 mm thickness (pre-heating temperature being 1 330°C). The chemical composition of the hot rolled strip is given in Table 1. The hot rolled strip was annealed at 1 000°C for 60 s and then quenched. The annealed hot-band material was subsequently cold rolled with a laboratory mill to 5 different reductions -25 %, 40 %, 60 %, 77 % and 88 %. Samples were obtained for all these conditions for bulk texture and OIM (Orientation Imaging Microscopy) measurements, using respectively the mid-thickness sections of the rolling plane (containing rolling and transverse directions, i.e. RD and TD) and the long transverse plane (containing rolling and normal directions, i.e. RD and ND).Bulk texture measurements were analyzed by inversion of 4 incomplete pole figures a...

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“…The etch pits arise from crystal structure of the specimens and can be connected with the crystalline orientation of the single grains, thus this method has been quite successfully applied in the determination of steel texture, 18,19 before the development of EBSD method. Another feature that can be observed is that the grain boundaries act as stopping points for pattern formation: At the boundary, the individual pattern is not transferred from one grain to another.…”

Section: Resultsmentioning

confidence: 99%

Orientation-dependent ion beam sputtering at normal incidence conditions in FeSiAl alloy

Batič

Jenko

2010

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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Articles you may be interested inPreparation and characterization of highly L 2 1 -ordered full-Heusler alloy Co 2 Fe Al 0.5 Si 0.5 thin films for spintronics device applications Appl. Phys. Lett. 92, 221912 (2008); 10.1063/1.2940595 Determination of stacking fault probability in fcc Fe-Mn-Si-Al alloy by electron diffractionThe authors have performed Ar+ broad ion beam sputtering of a polycrystalline Fe-Si-Al alloy at normal incidence at energies varying from 6 to 10 keV. Sputtering results in the formation of etch pits, which can be classified in three shapes: triangular, rectangular, and square. As each grain of individual orientation exhibits a certain type of pattern, the etch pits were correlated with the crystal orientations by electron backscattered diffraction technique.

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Determination of microtexture of initial stages of secondary recrystallisation in Fe–3 wt-%Si by etch pitting

Cited by 17 publications

References 3 publications

Effects of heating rate and hydrogen flow rate on magnetic induction and final grain texture of 3 pct silicon steel

Effects of heating rate and hydrogen flow rate on magnetic induction and final grain texture of 3 pct silicon steel

Development of Cold Rolled Texture and Microstructure in a Hot Band Fe-3%Si Steel.

Orientation-dependent ion beam sputtering at normal incidence conditions in FeSiAl alloy

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