Paper Titles
Formation of Ultrafine Ferrite Grains during Interrupted Multi-Pass Deformation under Hot Torsion
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Dynamic Recrystallization Mechanisms on Spot Welding of 6008 Aluminium Alloy to Steel by Friction Stir Welding
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Investigation of Retained Strains during Multipass Deformation
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Recrystallization Characteristics of Commercially Pure Titanium Rolled at Elevated Temperatures
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Effect of Warm Deformation on Ferrite Microstructure Evolution in a Ti-Microalloyed Steel
p.497
Microstructure Evolution during Warm Deformation of Low Carbon Steel with Dispersed Cementite
p.505
Effects of Precipitation during Dynamic Recrystallization of Copper with Different Oxygen Levels
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Modelling Dynamic Recovery and Recrystallization of Metals by a New Non-Equilibrium Thermodynamics Approach
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Microstructural Evolution Deformed Heavily by High Strain Rate at High Temperature Range in Ultra Low Carbon Steel
p.523

Effect of Warm Deformation on Ferrite Microstructure Evolution in a Ti-Microalloyed Steel

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Abstract:

Warm deformation is one of the promising hot rolling strategies for producing thin hot rolled steel strips. A better understanding of the microstructure evolution during warm deformation is important for a successful introduction of such processing into the industrial production. In the present research, the effect of deformation strain on the ferrite microstructure development in a low carbon Ti-microalloyed steel was investigated through warm torsion testing. Microstructural analysis with optical microscope and electron back-scattering diffraction was carried out on the warm deformed ferrite microstructures. The results show that at the early stage of deformation an unstable subboundaries network forms and low angle boundaries are introduced in the original grains. Then, with further straining, low angle boundaries transform into high angle boundaries and stable fine equiaxed ferrite grains form. It was considered that dynamic softening and dynamically formation of new fine ferrite grains, with high angle boundaries, were caused by continuous dynamic recrystallization of ferrite.

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Periodical:

Materials Science Forum (Volumes 558-559)

Pages:

497-504

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.558-559.497

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Online since:

October 2007

Authors:

Beitallah Eghbali

Keywords:

Electron Backscatter Diffraction (EBSD), Ferrite, Microalloyed Steel, Torsion Testing, Warm Deformation

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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