Physical parameters related to the developments of recrystallization textures in an ultra low carbon steel
Journal Article
·
· Acta Materialia
- KU Leuven, Heverlee (Belgium). Dept. MTM
- CRM, Gent (Belgium). Dept. Flat Rolling
Developments in deformation and recrystallization textures were studied in cold-rolled (50--90% reduction) ultra low carbon (ULC) steel using X-ray texture measurements and orientation imaging microscopy (OIM). During deformation, {gamma}-fiber (ND//{l_angle}111{r_angle}) increased between 0 and 50% reduction but then did not change significantly, while {alpha}-fiber (RD//{l_angle}110{r_angle}) increased progressively from 0 to 90% reduction. After complete recrystallization, however, a steady increase in {gamma} and almost no changes in {alpha} were observed with increasing strain. Developments in recrystallization textures were attributed to two parameters: (1) spacings ({lambda}{sub i}, as measured along the normal direction, ND, where i can be a specific component of {alpha}/{gamma}-fibers) of the {alpha}/{gamma} deformed bands; and (2) their relative ability to form recrystallized grains. While {lambda}{sub i} was determined by the deformation texture and the thicknesses of the deformed grains/bands and naturally decreased with increasing strain, estimations of parameter (2) were obtained from the so-called nucleation factors (N{sub i}, defined as the number of recrystallized i grains per i band--as measured/estimated along the ND). At higher strains, noticeable drops in the N{sub i}s of {alpha}-fiber were observed. Two plausible causes for such drops were increased stored energy advantages for {gamma} bands and orientation pinning in some of the {alpha} regions.
- OSTI ID:
- 328269
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 1 Vol. 47; ISSN 1359-6454; ISSN ACMAFD
- Country of Publication:
- United States
- Language:
- English
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