A Method for the Determination of Ferrite Grains with a Surface Normal close to the (111) Orientation in Cold Rolled Steel Samples with Color Etching and Optical Microscopy

Attila Bonyár; Péter J. Szabó

doi:10.4028/www.scientific.net/MSF.812.297

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A Method for the Determination of Ferrite Grains with a Surface Normal close to the (111) Orientation in Cold Rolled Steel Samples with Color Etching and Optical Microscopy
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HomeMaterials Science ForumMaterials Science Forum Vol. 812A Method for the Determination of Ferrite Grains...

A Method for the Determination of Ferrite Grains with a Surface Normal close to the (111) Orientation in Cold Rolled Steel Samples with Color Etching and Optical Microscopy

Abstract:

Cold rolled steel specimens were investigated by color etching. We proved that in this sample ferrite grains with a surface normal close to the (111) orientation are etched with the slowest speed with Beraha-I type color etchant, and that after a sufficient over-etching these specific grains could be distinguished based on this feature. It was demonstrated, that it is possible to stop the color etching in a phase when only grains with (111) orientation show color due to the layer interference, while all the other grains are dull gray due to a thick and transparent layer. This observation was utilized to develop a method to identify and quantify ferrite grains with (111) orientation in cold rolled steel samples with the application of color etching, optical microscopy and digital image post-processing.

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Periodical:

Materials Science Forum (Volume 812)

Pages:

297-302

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.812.297

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Online since:

February 2015

Authors:

Attila Bonyár*, Péter J. Szabó

Keywords:

Color Etching, Electron Back Scattering Diffraction (EBSD), Optical Microscopy, Steel

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