barnett-theinfluence-2004.pdf (1.59 MB)
The influence of solute carbon in cold-rolled steels on shear band formation and recrystallization texture
journal contribution
posted on 2004-01-01, 00:00 authored by Mark Nave, Matthew BarnettMatthew Barnett, Hossein BeladiHossein BeladiTwo experiments were conducted to clarify the roles of grain size, solute carbon and strain in determining the recrystallization textures of cold-rolled and annealed steels. In the first experiment, samples of coarse-grained low-carbon (LC) and interstitial-free (IF) steels were cold-rolled to a 75% reduction in thickness. One sample from each steel was polished and cold-rolled an additional 5%, while the remaining samples were annealed for various times at 650°C. In the second experiment, three samples from a commercial LC steel sheet were rolled 70% at 300°C. Two of the samples were given a further rolling reduction of 5% of the original thickness, with one of the samples being given this additional reduction at 300°C and the other at room temperature. Goss recrystallization textures are strengthened by coarse initial grain sizes, the presence of solute carbon and rolling at a temperature where dynamic strain ageing occurs, but are weakened by additional rolling beyond a reduction of 70%, especially when this extra rolling is conducted at a temperature where dynamic strain ageing does not occur. Characterization of key features of the deformed and recrystallized steels using optical microscopy, scanning electron microscopy (SEM) and electron back-scatter diffraction (EBSD) supports a rationale for these effects based on the repeated activation and deactivation of shear bands and the influence of solute carbon and dynamic strain ageing on the operating life of the bands and the accumulation of strain within them.
History
Journal
ISIJ internationalVolume
44Issue
6Pagination
1072 - 1078Publisher
Iron and Steel Institute of JapanLocation
Tokyo, JapanISSN
0915-1559eISSN
1347-5460Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2004, Iron and Steel Institute of JapanUsage metrics
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