Strain Localizations in Ultra Low Carbon Steel : Exploring the Role of Dislocations

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概要

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• Ultra low carbon steel samples were near plane strain deformed at different strains, strain rates and temperatures. Density of grain interior strain localizations in γ (ND//<111>) and θ (ND//<100>) fibres were evaluated against micro-stress estimates through X-ray line profile measurements. The patterns were remarkably different between the fibres. The increase in strain localizations were associated with increased dislocation density. This effect was more pronounced in γ-fibre. In θ-fibre, however, the peaks were increasingly more asymmetric and dislocation substructures were stipulated to have lesser recovery. Discrete dislocation dynamics simulations for single crystal pure iron also brought in different behavior for γ and θ fibres: increase in dislocation density in the former was estimated to be ~5 times more. A combination of textural softening and large/positive increase in dislocation density appears to justify the preference for strain localizations in γ-fibre.

• 2011-05-15

著者

• Kestens L.

  Department Of Flat Rolling Centre For Research In Metallurgy

• Kestens L.

  Delft University Of Technology Materials Science And Engineering Department

• KHATIRKAR R.

  Department of Metallurgical and Materials Engineering, Visvesvaraya National Institute of Technology

• SAMAJDAR I.

  Department of Metallurgical Engineering and Materials Science

• Petrov R.

  Department Of Metallurgy And Materials Science Ghent University

• Samajdar I.

  Department Mtm Katholieke Universiteit Leuven

• Khatirkar R.

  Department Of Metallurgical And Materials Engineering Visvesvaraya National Institute Of Technology

• Petrov R.

  Department Of Materials Science And Engineering Ghent University

• Mani Krishna

  Material Science Division

• Pant P.

  Department Of Metallurgical Engineering And Materials Science

関連論文

• Controlled Warm Working : Possible Tool for Optimizing Stored Energy Advantage in Deformed γ-fiber (ND//)
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• Developments in Macro and Micro Texture during Plane Strain Channel Die Compression of IF Steel
• Transformations during Intercritical Annealing of a TRIP-assisted Steel
• Textural Changes through Grain Growth in Ti-bearing IF-steel Investigated by Orientation Imaging Microscopy and X-ray Diffraction
• Modelling Texture Change during the Static Recrystallization of a Cold Rolled and Annealed Ultra Low Carbon Steel Previously Warm Rolled in the Ferrite Region
• Strain Localizations in Ultra Low Carbon Steel : Exploring the Role of Dislocations

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