Fragmentation of Orientation within Grains of a Cold-rolled Interstitial-free Steel

• Published in: ISIJ International Vol. 44; no. 1; pp. 187 - 196
• Main Authors: Nave, Mark Denis, Barnett, Matthew Robert
• Format: Journal Article
• Language: English
• Published: Tokyo The Iron and Steel Institute of Japan 01-01-2004; Iron and Steel Institute of Japan
• Subjects: cold rolling; Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization; Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures; Cross-disciplinary physics: materials science; rheology; EBSD; electron backscatter diffraction; Exact sciences and technology; IF steel; Materials science; misorientation; Physics; shear bands; steel; texture; Treatment of materials and its effects on microstructure and properties; Cold rolling; Electron backscattering; Very low carbon steel; Recrystallization; Experimental study; Microstructure; Shear band; High angle grain boundary; Texture; Pole figures
• ISSN: 0915-1559; 1347-5460
• DOI: 10.2355/isijinternational.44.187

The formation of a favourable recrystallization texture in interstitial-free (IF) steels depends on the availability and activation of particular nucleation sites in the deformed microstructure. This paper presents a description of the deformed microstructure of a commercially cold-rolled IF steel, with particular emphasis on the microstructural inhomogeneities and short-range orientational variation that provide suitable nucleation sites during recrystallization. RD-fibre regions deform relatively homogeneously and exhibit little short-range orientational variation. ND-fibre regions are heavily banded and exhibit considerable short-range orientational variation associated with the bands. While the overall orientational spread of ND-fibre grains frequently is about the ND-axis, the short-range orientational variation often involves rotation about axes in the TD-ND plane that are nearer to the TD than the ND.