Detailed Microstructural Evolutions of TWIP Steel During Tensile Straining: In situ SEM Observations

Document Type: Research note


1 Central laboratory, University of Isfahan, Isfahan 81746-73441, Iran

2 K.U.Leuven, Department of Metallurgy and Materials Engineering, Kasteelpark Arenberg 44, B-3001 Leuven, Belgium

3 Steel Institute, Isfahan University of Technology 84156-83111, Iran


Microstructural evolutions of twinning induced plasticity (TWIP) steel during tensile straining were investigated by in situ SEM observations. The results indicated that slip lines and mechanical twins as well as surface relief were increased with increasing strain, resulting in a stepped surface. Additionally, these deformation mechanisms could change the shape of each grain via shear and rotation. Nonuniformly distributed strain within grains led to change in the misorientation or banding of deformation markings with further straining.


S. Vercammen, B. Blanpain, B.C. De Cooman and P. Wollants: Acta. Mater., 52(2004), 2005.
G. Dini, A. Najafizadeh, R. Ueji and S.M. Monir-Vaghefi: Mater. Des., 31(2010), 3395.
G. Dini, R. Ueji, A. Najafizadeh and S.M. Monir-Vaghefi: Mater. Sci. Eng. A., 527(2010), 2759.
M.N. Shiekhelsouk, V. Favier, K. Inal and M. Cherkaoui: Int. J. Plas., 25(2009), 105.
S. Allain, J.P. Chateau and O. Bouaziz: Mater. Sci. Eng A., 387-389(2004), 143.
P.H. Adler, G.B. Olson and W.S. Owen: Metall. Trans. A., 17A(1986), 1725.
S. Asgari, E. El-Danaf, S.R. Kalidindi and R.D. Doherty: Metall. Mat. Trans. A., 28A(1997), 1781.