冷延軟鋼板再結晶集合組織の三次元的方位解析
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The main purpose of this paper was to study systematically the development recrystallized textures of cold-rolled sheets of mild steel, such as aluminum killed steel and rimmed steel, by means of a three-dimensional orientation distribution function. The deformation texture in cold rolling showed sufficient spreads, although {112} <11^^-0>, {100} <011> and {554} <225^^-> orientations existed preferentially. The annealing of aluminum killed steel sheet below 600℃ resulted in the gradual decrease of {100} <011> and {112} <11^^-0> components, but that annealing provided no drastic change in texture : the annealing texture were nearly the same as the deformed one. The three-dimensional analysis showed that the texture of the sheet annealed above 600℃ changed remarkably, i. e. {100} <0vw> components decreased repidly and {111} <uvw> group developed. Especially, the intensity of {111} <011^^-> orientation grew stronger. It was observed during development of those recrystallized textures, that the dispersion of <110> fiber texture being parallel to the rolling direction decreased, and {112} <11^^-0> orientation disappeared gradually. Another purpose of this paper was to carry out a precise analysis of fully recrystallized texture. It has been said that the preferred orientation of recrystallized sheets of mild steel, especially that of aluminum killed steel sheet, is {111} <011^^-> and {554} <225^^-> according to the pole figure analysis: however, the three dimensional analysis has given no clear evidence that {554} <225^^-> can be the highest intensity region. The discrepancy of the results given by these two analyses was explained by using the "three-dimensional orientation distribution function", w(ψ, θ, φ). From its definition, the pole density on "ND-RD axis", the plane containing the ND axis and the RD axis, in {100} pole figure ought to agree with w(0, θ, φ^^-). (ND is the normal direction, and w(0, θ, φ^^-) is the average of w(ψ, θ, φ) with φ from O to π/2, when angle ψ is 0.) The results obtained showed that the values of w(0, θ, φ^^-) agreed precisely with the pole density on the ND-RD axis of {100} pole figure. This fact leads to the clear conclusions that the highest intensity point of {554} <225^^-> poles is due to w(O゜, 60゜, φ^^-) and that the point is irrelevant to any preferred orientation.
- 社団法人日本材料学会の論文
- 1980-08-15
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