Interaction of Recrystallization and Precipitation during Hot Forming of Alloy 80A


Article Preview

In the high temperature deformation window of the nickel base Alloy 80A the lower temperature region during open die forging was examined with regard to the materials formability. For that purpose, hot compression samples were investigated by means of EBSD and TEM in order to look at recrystallization, precipitations and ductile damage as well as their reciprocal effects. Further a microstructure model was used, which calculates the materials strengthening, softening and the particle kinetics. A micro mechanical damage model of the effective stresses was coupled with the grain structure development in order to describe a retarded damage rate due to the ongoing recrystallization.



Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran




C. Sommitsch et al., "Interaction of Recrystallization and Precipitation during Hot Forming of Alloy 80A", Materials Science Forum, Vols. 539-543, pp. 2988-2993, 2007

Online since:

March 2007




[1] C. Sommitsch and V. Wieser: Microstructural Simulation of Hot Forming Processes (Proc. EUROMAT 2001, Associazione Italiana di Metallurgia, Rimini 2001).

[2] J. Lemaitre: A Course on Damage Mechanics (Springer Verlag, Berlin 1996).

[3] C. Sommitsch and G. Rüf: Ductile fracture analysis with damage models of effective stresses at high temperatures (Proc. ICTP '05, Verona 2005).

[4] C. Sommitsch and W. Mitter: Acta Mater. 54 (2006), p.357.

[5] C. Sommitsch, E. Kozeschnik, G. Wasle and B. Buchmayr: A precipitation model for multi- component multi-phase systems in nickel-base superalloys (Proc. THERMEC´2000, Elsevier, Las Vegas 2000).

[6] E. Kozeschnik: Calphad 24/3 (2000), p.24.

[7] N. Saunders: Phil. Trans. 351A (1995), p.543.

[8] J. -O. Andersson and J. Agren: J. Appl. Phys. 72 (1992), p.1350.

[9] J.O. Andersson, L. Hoeglund, B. Joensson and J. Agren: Fundamentals and Applications of Ternary Diffusion (Pergamon Press, New York 1990).

[10] R. Sandström and R. Lagneborg: Acta Metall. 23 (1975), p.387.

[11] W. Roberts and B. Ahlblom: Acta Metall. 26 (1978) p.801.

[12] N. Srinivasan and Y. Prasad: Mater. Sci. Techn. 8 (1992), p.206.

[13] C. Sommitsch, M. Walter, S. Kleber, P. Pölt and S. Mitsche: STEEL GRIPS 3 (2005) 4, p.287.

[14] P. Pölt, C. Sommitsch, S. Mitsche and M. Walter: Mater. Sci. Eng. A (2006) in press.

[15] B. Tian, G. Zickler, C. Lind and O. Paris: Acta Mater. 51 (2003), p.4149.