S. Diligent et al., Lattice orientation dependence of the stored energy during cold-rolling ofpolycrystalline steels, ACT MATER, 49(19), 2001, pp. 4079-4088
During cold deformation, about 10% of the energy spent is stored in the pol
ycrystalline material in the form of the elastic energy associated to cryst
al defects. The latter can be measured experimentally by calorimetry, X-ray
diffraction. In this work, we propose a direct calculation based on an ela
stic-plastic self-consistent model, The part of the stored energy related t
o second order (intergranular) stresses is estimated for a cold-rolled Ti-I
F steel. The stored energy as well as the accumulated plastic strain are re
ported as a function of the final crystallographic orientation of the grain
s. Along the alpha -fiber, the stored energy increases from {001}< 110 > to
{111}< 110 > while the plastic strain decreases. This dependence with the
crystallographic orientation is in good agreement with experimental results
. With respect to recrystallization, experiments show that {111}-grains nuc
leate first. This highlights the specific role of second order (intergranul
ar) stresses for recrystallization. (C) 2001 Acta Materialia Inc. Published
by Elsevier Science Ltd. All rights reserved.