OIM Analysis of Microstructure and Texture of a TRIP Assisted Steel after Static and Dynamic Deformation


Article Preview

TRIP-assisted steel with a composition of 0.2%C, 1.6%Mn, 1.5%Al was studied in the undeformed state, after the application of 10 and 30 % static tensile strain parallel to rolling the direction of the sheet and after dynamic (Hopkinson) fracture test. Detailed examination of the microstructure and microtexture by means of electron backscattered diffraction (EBSD) was carried out in order to quantify the microstructural constituents and to study the strain distribution. The microtexture evolution and the distribution of the specific texture components between the BCC and FCC phases were studied as a function of the external strain and the strain mode-static or dynamic. The strain localization and strain distribution between the structural constituents were quantified based on local misorientation maps. The full constraint Taylor model was used to predict the texture changes in the material and the results were compared to the experimental findings. Comparing the local misorientation data it was found that at low strains the ferrite accommodates approximately 10 times more deformation than the retained austenite. The strain localizes initially on the BCC-FCC phase boundaries and is then spread in the BCC constituents (ferrite and bainite) creating a deformation skeleton in the BCC phase. It was found that the observed texture changes in the measured retained austenite texture after deformation do not correspond exactly to the model prediction. The austenite texture components which were predicted by the Taylor model were not found in the measured austenite texture after deformation which means that they are first transformed to martensite, which is considered as an indication for the selective transformation of austenite under strain.



Materials Science Forum (Volumes 638-642)

Main Theme:

Edited by:

T. Chandra, N. Wanderka, W. Reimers , M. Ionescu




R. H. Petrov et al., "OIM Analysis of Microstructure and Texture of a TRIP Assisted Steel after Static and Dynamic Deformation", Materials Science Forum, Vols. 638-642, pp. 3447-3452, 2010

Online since:

January 2010




[1] E. Girault: Bainitic Transformation in TRIP-Assisted Steels and its Influence on Mechanical Properties, Ph.D. Thesis, MTM, KU Leuven, (1999).

[2] P. Jacques: On the Physics and Mechanics of Phase Transformations in TRIP-Assisted Multiphase Steels, PhD thesis, UCL, (1998).

[3] M. De Meyer: Transformation and mechanical properties of cold rolled and intercritically annealed CMnAlSi TRIP-aided steels, PhD Thesis, Dept. of Metallurgy and Materials Science, Ghent University, Belgium, (2001).

[4] L. Barbé, K. Verbeken and E. Wettinck: ISIJ International, 46 (8), (2006), pp.1249-1255.

[5] Q. Furnémont: The micromechanics of TRIP-assisted multiphase steels, PhD thesis, UCL, (2003).

[6] R. Petrov et al., Mater. Sci. Eng. A, Vol. 447, (2007), pp.285-297.

[7] P. Van Houtte: MTM-FHM Software User Manual, MTM-KU Leuven, 1995. (private communication).

[8] P. Van Houtte: Text. & Microstructure, Vols. 8-9, (1988), pp.313-350.

[9] M. De Meyer, L. Kestens, and B. C. De Cooman: Mater. Sci. Technol., Vol. 17, (2001), pp.1353-1359.

[10] H.K.D.H. Bhadeshia: Bainite in Steels, Second edition IOM Communications Ltd, The University Press Cambridge, (2001) p.28.

[11] Zaefferer, S. , Romano P. and Friedel F: Journal of Microscopy, Vol. 230, Pt 3 2008, pp.499-508.

[12] N. Zaafarani, et al., Acta Mater., Vol. 56, (2008), pp.31-42.

Fetching data from Crossref.
This may take some time to load.