High Temperature Low Cycle Fatigue of Superalloys Inconel 713LC and Inconel 792-5A


Article Preview

Cylindrical specimens of cast polycrystalline nickel base superalloy Inconel 713 LC and Inconel 792-5A were cyclically strained under total strain control at 23 and 700 °C. Morphology and volume fraction of γ´ precipitates are different in both materials. Cyclic hardening/softening curves, cyclic stress-strain curves, and fatigue life curves were obtained at both temperatures. The cyclic hardening/softening curves depend both on temperature and plastic strain amplitude. The cyclic stressstrain curves can be fitted by power law. Experimental data of fatigue life curves can be approximated by the Manson-Coffin and Basquin laws. Dislocation structure was studied in transmission electron microscope. Planar dislocation arrangements in the form of bands parallel to {111} planes were identified in both superalloys at both temperatures. Stress-strain response and fatigue life characteristics are compared at both temperatures and discussed in relation to dislocation arrangement and structural parameters of the materials studied.



Key Engineering Materials (Volumes 348-349)

Edited by:

J. Alfaiate, M.H. Aliabadi, M. Guagliano and L. Susmel




M. Petrenec et al., "High Temperature Low Cycle Fatigue of Superalloys Inconel 713LC and Inconel 792-5A", Key Engineering Materials, Vols. 348-349, pp. 101-104, 2007

Online since:

September 2007




[1] M.J. Donachie and S.J. Donachie: Superalloys. A Technical Guide, Mater. Park OH, ASM Int. (2002).

[2] R.E. Stoltz, A.G. Pineau: Mater. Sci. Eng. Vol. 34 (1987), p.275.

[3] K. Obrtlík., J. Man and J. Polák, in: Proceedings of 7th European Conference on Advanced Materials and Processes EUROMAT (2001), No. 894.

[4] K. Obrtlík, J. Man, M. Petrenec and J. Polák, in: Fatigue 2002, EMAS, West Midlands, UK, (2002), p.963.

[5] M. Petrenec, K. Obrtlík and J. Polák: Mater. Sci. Eng. Vol. A400-401 (2005), p.485.

[6] M. Petrenec, K. Obrtlík, J. Polák and T. Kruml: Mater. and Technol. Vol. 40 (2006) 5, p.175.

[7] K. Obrtlík, M. Petrenec, J. Man, J. Polák and K. Hrbáček, in: Fatigue 2006, Georgia Inst. of Technology, Atlanta (2006), paper No. FT307. Fig. 5 Persistent slip bands in IN 713LC (TEM, 23°C).