Journal
MATERIALS SCIENCE AND TECHNOLOGY
Volume 20, Issue 12, Pages 1538-1544Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/026708304X4367
Keywords
ultrafine ferrite; plain carbon steels; thermomechanical processing; dynamic strain induced transformation; carbon content; deformation temperature
Ask authors/readers for more resources
In the present study, the effect of nominal equivalent strain (between 0 and 1.2), deformation temperature (790-750degreesC) and carbon content (0.06 - 0.35% C) was investigated on ferrite grain refinement through dynamic strain induced transformation (DSIT) in plain carbon steels in single pass rolling. The microstructural evolution of the transformation of austenite to ferrite has been evaluated through the thickness of the strip. The results showed a number of important microstructural features as a function of strain, which could be classified into three regions; no DSIT region, DSIT region, and ultrafine ferrite (UFF) grain region. Hence, two critical strains; dynamic strain induced transformation (epsilon(C, DSIT)) and ultrafine ferrite formation (epsilon(C, UFF)) were determined. These strains were increased significantly with an increase in carbon content. The critical strain for UFF formation reduced with decrease in deformation temperature. The UFF microstructure consisted of ultrafine, equiaxed ferrite grains (<2 mu m) with very fine cementite particles. In the centre of the rolled strip, there was a conventional ferrite-pearlite microstructure, although ferrite grain refinement and the volume fraction of ferrite increased with increase in the nominal equivalent strain.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available