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Effect of precipitate size and dispersion on recrystallization behavior in Ti‐added ultra low carbon steels
Author(s) -
Shin E. J.,
Seong B. S.,
Han Y. S.,
Hong K. P.,
Lee C. H.,
Kang H. J.
Publication year - 2003
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889803003856
Subject(s) - recrystallization (geology) , materials science , solvent drag , neutron diffraction , small angle neutron scattering , metallurgy , microstructure , neutron scattering , crystallography , scattering , chemistry , crystal structure , paleontology , physics , grain boundary , optics , biology
The effect of coiling temperature on precipitates and solid solution was investigated in P‐free and P‐added Ti‐stabilized ultra low carbon steels. The volume fractions of the fine precipitates smaller than 60 nm were evaluated by using small‐angle neutron scattering technique. The solute P was quantified from the lattice parameters obtained from neutron diffraction patterns. In the P‐free steels, TiC and Ti 4 C 2 S 2 with various sizes ranging from 5~60 nm were observed. In addition to these precipitates, FeTiP precipitates of a size exceeding 50 nm were also observed in the P‐added steel. The amount of fine precipitates smaller than 10 nm and the concentration of solute P was higher in the samples coiled at low temperature. The recrystallization temperature increases if the coiling temperature decreases in both, P‐free and P‐added steels. The recrystallization temperature of P‐free steels is lower than that of P‐added steels. In the P‐free steels, the pinning effect of fine precipitates played a key role for the retardation of the recrystallization. In the P‐added steels, the retardation of recrystallization is due to both, the pinning effect of fine precipitates and the solute drag effect of P in solid solution.