Physics of Metals and Metallography 期刊1篇
【题名】：The Role of Strain Heterogeneities in the Formation of Annealing Textures in Ultra-Low Carbon Steels【作者】：L. Kestens, K. Verbeken and J. J. Jonas
【杂志名全称】：Physics of Metals and Metallography
【年, 卷(期), 起止页码】：找不到
【DOI】：找不到
【全文链接】：[url]http://www.maik.ru/abstract/physmets/3/physmets2_3p35abs.htm[/url]
【摘要信息】：The detailed features of the nucleation textures of static recrystallization critically depend on the
characteristics of the deformation structure. In the present paper, the strain heterogeneities present in ultra-low
carbon steels after low and high rolling reductions are described. After a rolling reduction of 30%, orientation
gradients and low-angle grain boundaries appear in deformed grains. These strain heterogeneities produce ori-
entation spreads of the order of 5deg about the average orientation of a single grain. It is shown that there is no
correlation between this spread and the Taylor factor of the grain. After a rolling reduction of 70%, the defor-
mation structure is characterized by highly elongated grains that display well developed internal structures. The
strain heterogeneities of the low Taylor factor grains (primarily 110//RD fiber grains) are mainly concentrated
in the vicinity of pre-existing boundaries, whereas the high Taylor factor grains (111//ND fiber grains) are
fragmented over their entire volumes. The presence of in-grain shear bands in the ND fiber grains is considered
in detail. By modeling the orientation rotations in these bands (which enclose an angle of 20 to 35deg with
respect to the rolling direction) it is shown that grains with an initial orientation of {111}110 or {111}112
rotate towards {554}110 or {554}225, respectively. Such local orientation changes are taken to be respon-
sible for the detailed features of the nucleation texture of ND fiber orientations in that they are somewhat shifted
with respect to the skeleton line of the ideal ND fiber.
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