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| QUANTITATIVE DETERMINAMON OF GRAIN ORIENTATION AND TEXTURE BY ETCH-FIGURE METHOD |
| Luo Yang |
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Cite this article:
Luo Yang. QUANTITATIVE DETERMINAMON OF GRAIN ORIENTATION AND TEXTURE BY ETCH-FIGURE METHOD. Acta Metall Sin, 1977, 13(z1): 93-108.
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Abstract The etch-figure method which is useful for determining the crystal orienta-tions of grain-oriented silicon iron with sufficient accuracy for industrial practicehas been examined. In this paper an attempt has been made to measure theorientations of the secondary recrystallized grains by means of this method, thedistribution and the changes of the textures in the longitudinal section alongcertain depths being observed. The preparation of the specimens has been described and a method of de-termining the grain orientations by using the geometrical parameters of theetch-figures is given. In order to determine the orientations, three angular para-meters are used: angle θ between the rolling direction and the projection of[001] on the surface of sheet; angle φ between [001] and the surface of sheet,and angle ω between [110] and the sheet surface. The geometrical parametersof both triangular and rectangular etch-figures produced by {100} -attack asfunction of φ and ω have been deduced. For practical uses in the orientationdetermination, the relationship between the etch-figure parameters and the cor-responding φ and ω are listed in tables. With known values of θ, φ and ω, the{100} pole figures can be drawn to show the degree of misorientation of thematerial.
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[1] Mueller, M. H. et al., Rev. Sci. Instrum., ?as (1954) , 1115．
[2] Illgeh, L. et al., Prakt. Metall?gr., 6 (1969) , 363．
[3] Tassy-Betz, E. et al, Metallography, 7 (1974) , 1． |
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