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Microstructural evolution of IF-steel during cold rolling
- Source :
-
Acta Materialia . Feb2004, Vol. 52 Issue 4, p1069. 13p. - Publication Year :
- 2004
-
Abstract
- The microstructural evolution during cold rolling of IF-steel up to reductions of 90% has been investigated using scanning and transmission electron microscope techniques. The deformation microstructures consist of similar features to those already identified in several FCC metals, namely cell blocks showing a pattern of subdivision on two levels. An important difference compared to FCC metals is an increased prevalence of strain localization, seen most directly by highly localized micro-shearing. An orientation dependence of the deformed microstructure is observed in that nearly all the extended dislocation boundaries and micro-shear traces are crystallographic, coincident either with {1 1 0} or {1 1 2} slip planes. A sharp fall in ductility seen between rolling reductions of 30% and 50% is attributed to the onset of localized micro-shearing. A flow stress calculation, based on linearly additive contributions from dislocation and grain boundary hardening, leads to flow stress values and a strain hardening behavior in good agreement with experimentally determined values. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 13596454
- Volume :
- 52
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Acta Materialia
- Publication Type :
- Academic Journal
- Accession number :
- 12168229
- Full Text :
- https://doi.org/10.1016/j.actamat.2003.10.040