Quantitative Description of the Structure and Substructure of Hot − Deformed Fe – Ni Austenitic Alloy


Article Preview

The paper presents the results of research concerning the influence of hot deformation parameters on the structure and substructure as well as the plastic properties of a Fe–Ni austenitic alloy. The research was performed on a torsion plastometer in the range of temperatures of 900÷1150°C, at a strain rate 0.1 and 1.0 s-1. Plastic flow curves have been drawn up and the interrelations have been determined between the process parameters and the recrystallized grain size, inhomogeneity and shape. Functional relations between the Zener-Hollomon parameter and the mean grain size after dynamic recrystallization have been developed and the hot deformation activation energy has been estimated. The examination of substructure on TEM allowed the calculation of structural parameters: the average subgrain area and the mean dislocation density. A detailed investigation has shown that the substructure is inhomogeneous, consists of dense dislocation walls, subgrains and recrystallized regions.



Edited by:

B.G. Wendler, P. Kula and J. Jedlinski






K. J. Ducki et al., "Quantitative Description of the Structure and Substructure of Hot − Deformed Fe – Ni Austenitic Alloy ", Materials Science Forum, Vol. 513, pp. 51-60, 2006

Online since:

May 2006




[1] L.X. Zhou, T.N. Baker: Mater. Sci. Eng. A Vol. 177 (1994) p.1.

[2] M. Kono, T. Yamada, A. Suzuki and S. Ohta: Proc. Internationale Schmiedetagung (Verein Deutscher Eisenhüttenleute, Düsseldorf (1981) 4. 1. 1. ).

[3] K.A. Bywater, T. Gladman: Metal. Technol. Vol. 2 (1976) p.358.

[4] S.M. Zhu, F.G. Wang and S.J. Zhu: Mater. Trans. Vol. 5 (1993) p.450.

[5] K.J. Ducki, M. Hetmańczyk and D. Kuc: Proc. 7th Liège Conf. Materials for Advanced Power Engineering Vol. 21, Part I (2002) 401.

[6] K.J. Ducki, K. Rodak, M. Hetmańczyk and D. Kuc: Mater. Chem. Phys. Vol. 81 (2003) p.493.

[7] I. Schindler, E. Hadasik: Proc. Conf. Challanges to Civil and Mechanical Engineering in 2000 and beyond. (CCME'97, Wrocław, Poland Vol. II (1997) p.397).

[8] I. Schindler, J. Boruta: Utilization Potentialities of the Torsion Plastometer (Survey elaborated for Department of Metal Forming, Silesian University of Technology, Katowice, Poland 1998).

[9] J. Cwajna, M. Maliński and J. Szala: Mater. Eng. Vol. 4 (1994) p.79 (Sigma NOT, Warsaw, in Polish).

[10] H.J. Klaar, P. Schwaab and Ö. Werner: Prakt. Metallogr. Vol. 29 (1992) p.3.

In order to see related information, you need to Login.