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Texture and Orientation Relationships in Phosphorus Added TRIP Steels

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Abstract:

Phosphorus added TRIP steels were subjected to Electron BackScattering Diffraction (EBSD) measurements in order to study the texture of the three different phases and in order to evaluate the orientation relations that are active during the transformation of austenite to bainite. The retained austenite had a maximum intensity on the Brass component and the intensity gradually decreased along the alpha and the beta fibre. The intensity of both BCC phases was comparable, but the bainite texture displayed clear transformation products that could be related with the dominant Brass component of the intercritical austenite. A detailed evaluation of the crystallographic orientation relationships between about 360 retained austenite grains and their BCC neighbours was performed. Three relationships were considered, namely Kurdjumov-Sachs, Nishiyama-Wassermann and Pitsch. It was found that the majority of the austenite grains had at least one neighbour that could be related with one of the three orientation relationships. The Kurdjumov-Sachs relationship appeared to be dominant and no strong indication for variant selection could be retrieved from the studied data.

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Periodical:

Materials Science Forum (Volumes 539-543)

Pages:

3347-3352

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.539-543.3347

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Cite this paper

Online since:

March 2007

Authors:

Kim Verbeken, L. Barbé, Bruno C. De Cooman

Keywords:

Electron Backscatter Diffraction (EBSD), Orientation Relationship, Texture, TRIP Steel

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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