In this paper, the influence of rolling parameters (i.e. rolling temperature, roll speed, roll temperature, friction and the ratio of
the mean thickness to the contact length in the roll gap Hm/L) on static recrystallization (SRX) behaviour is studied by the
combination of the finite element method (FEM) with the Taguchi experimental
method. The FEM is first applied to simulate a single pass laboratory
rolling experiment by the use of both empirical and physical models. A new
approach is used to generate the mean value of the Zener-Hollomon parameter,
which is necessary for the prediction of the volume fraction recrystallized
(XV) when the empirical SRX model is used. A physical model which
considers the density of recrystallization nuclei and the total stored
energy is also applied based on the prediction of internal dislocation
density, subgrain size and misorientation. The predicted XV and the
recrystallized grain size at the centre and subsurface fit well with
experimental measurements from the literature. Then, the Taguchi method is
applied to design an orthogonal experimental table, L9({34}), which indicates that there are four parameters, each parameter has
three levels and a total of nine test runs need to be conducted. These nine virtual
experiments are analysed by the use of FEM. The predicted results are then
analysed by the use of the Taguchi method from which the influence of each
rolling parameter on XV is given. The studies show that rolling
temperature has the greatest influence on XV for the centre point whilst
friction is the most important parameter on the determination of XV
within the surface region. The roll temperature and roll speed have little
influence on XV for both the centre and subsurface point.
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