Evolution of Crystallographic Texture in Pure Iron and Commercial Steels by γ to α Transformation

Jin Kyung Sung; Dong Nyung Lee

doi:10.4028/www.scientific.net/MSF.706-709.2657

Paper Titles

Thermomechanical Treatment for Enhancing Deep Drawability of Copper-Bearing Bake Hardening Steel
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Numerical Model of Microstructure and Fracture of Coated Aluminum Alloys: A Novel Design Approach
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Influence of Surface Micro Texture on Photocatalitic Function of Titanium Dioxide Film
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Microstructure and Texture Development in Pure Ta Sheets Processed by Conventional Rolling and Cross Roll Rolling
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Evolution of Crystallographic Texture in Pure Iron and Commercial Steels by γ to α Transformation
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Texture Evolution in Nanocrystalline Fe Induced by Surface Mechanical Attrition Treatment
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Crystallographic Behaviors of Uni-Axial Deformed High Manganese Steels
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Calculation Methods to Determine Crystallographic Elements Based on Electron Diffraction Orientation Measurements by SEM/EBSD or TEM
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Effects of Magnetic Field Intensity on Microstructure and Orientation of Proeutectoid Ferrite in Fe-C Alloy
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Evolution of Crystallographic Texture in Pure Iron and Commercial Steels by γ to α Transformation

Abstract:

A novel method has been discovered for controlling the crystallographic orientation of pure iron using the γ to α phase transformation. When pure iron with clean metal surfaces undergoes the γ to α phase transformation, it develops a strong cube-on-face texture ({100}<0vw>) with the grain size being larger than the sheet thickness. The mechanism controlling the <100> orientation obtained is associated with the fact that the {100} faces are elastically compliant so that the <100> texture can develop in a manner consistent with minimization of strain energy. However, in commercial steels, although so many texture analyses have been conducted, the cube-on-face texture has been rarely observed. According to thermodynamic analysis, surface oxidation in commercial steels appears to be responsible for the deterioration of the <100> texture. This phenomenon can be explained in terms of the modification of the inherent elastic anisotropy of metal surface by the surface oxidation.