Nucleation and Growth of Surface Texture during α-γ-α Transformation in Ultra Low Carbon Steel Alloyed with Mn, Al and Si

Jai Gautam; Roumen H. Petrov; Elke Leunis; Leo A.I. Kestens

doi:10.4028/www.scientific.net/SSP.160.223

Paper Titles

Surface Texture Modification for Improved Roping Behaviour of Aluminium Alloy 6016
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A New Approach to Calculate the γ Orientation Maps in Steels
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Microstructure Investigations of the Phase Boundaries in the Bridgman TRIP Steel Crystal
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Elementary Facet Method for Grain Boundary Plane Determination by 3D EBSD
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Nucleation and Growth of Surface Texture during α-γ-α Transformation in Ultra Low Carbon Steel Alloyed with Mn, Al and Si
p.223

An Easy Approach to Increase the Precision of EBSD Analysis – Examples from a Sea Urchin Calcite Study
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Effect of Annealing on Microstructural Development and Grain Orientation in Electrodeposited Ni
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Formation of Goss Texture in Grain Oriented Electrical Steel Sheets Produced by Commercial Compact Strip Processing
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Influence of MnS Particles inside Grains on the Boundary Migration before Secondary Recrystallization of Grain Oriented Electrical Steels
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Nucleation and Growth of Surface Texture during α-γ-α Transformation in Ultra Low Carbon Steel Alloyed with Mn, Al and Si

Abstract:

. It is well known that surface energy anisotropy is one of the driving forces for the orientation selection at the metal-vapour interface. This affects the microstructure and texture evolution at the surface during phase transformation, which is an inherent feature of low-alloyed low-carbon steels. This paper investigates the nucleation and growth of the surface texture by orientation contrast microscopy. It has been found that the surface texture is dominated by {001} oriented grains, which exhibit a remarkable orientation gradient from the centre of the grain towards the edge. The {001} oriented grain centre gradually rotates around a <110> axis in small incre¬mental steps when nearing the edge of the grain. Towards the edge the accumulated rotation angle has commonly reached a value of 30°. Underneath the surface grains (~30 µm) the bulk texture consists of a strong -fibre.