Skip to main content Accessibility help

Research on constitutive equations and hot working maps of Incoloy028 alloy based on hot compression tests

  • Zhiqiang Yu (a1), Leifeng Tuo (a2) and Genshu Zhou (a3)


Hot deformation behavior of Incoloye028 alloy was investigated by conducting hot compression tests on Gleeble-3800 simulator in the temperature range of 1223–1473 K and the strain rate range of 0.1–50 s−1. True stress–true strain curves showed that the flow stress increases with the decrease of deformation temperature and the increase of strain rate. The constitutive equations of Incoloy028 alloy were obtained by introducing Zener–Hollomom parameter, the flow behavior can be described by the hyperbolic sine function and the activation energy changes with strain rate and temperature significantly. The hot working maps of Incoloy028 alloy were proposed on basis of dynamic materials model. The hot working maps for different strains indicated that there were two instability zones, one zone is in the temperatures range of 1423–1473 K and strain rate range of 0.1–50 s−1, and another zone is in the temperature range of 1223–1423 K and strain rate range of 0.6–1 s−1. The reasonable hot working temperature range is 1423–1473 K when strain rate is more than 50 s−1.


Corresponding author

a)Address all correspondence to this author. e-mail:


Hide All
1.Liu, H.D., Wang, D.Z., and Wei, H.D.: Material selection and application of high performance stainless steels used in sour oil and gas fields. Corros. Prot. 32(10), 817821 (2011).
2.Sun, C.Y., Liu, J.R., Li, R., Zhang, Q.D., and Dong, J.X.: Effect of process parameters on the exit temperature of IN690 alloy tubes during hot extrusion. J. Univ. Sci. Technol. Beijing 32(11), 14831488 (2010).
3.Sun, C.Y., Liu, J.R., Li, R., and Zhang, Q.D.: Constitutive modeling for elevated temperature flow behavior of Incoloy 800H superalloy. Acta Metall. Sin. 47(2), 191196 (2011).
4.Sun, C.Y., Liu, G., Zhang, Q.D., Li, R., and Wang, L.L.: Determination of hot deformation behavior and hot working maps of IN 028 alloy using isothermal hot compression test. Mater. Sci. Eng., A 595(10), 9298 (2014).
5.Murty, S.V.S.N. and Rao, B.N.: On the development of instability criteria during hotworking with reference to IN 718. Mater. Sci. Eng., A 254(15), 7682 (1998).
6.Cai, D.Y., Xiao, L.Y., Liu, W.C., Sun, G.D., and Yao, M.: Characterization of hot deformation behavior of a Ni-base superalloy using processing map. Mater. Des. 30(3), 921925 (2009).
7.Sellars, C.M. and Tegart, W.J.M.: On the mechanism of hot deformation. Acta Metall. 14(9), 11361138 (1966).
8.McQueen, H.J. and Ryan, N.D.: Constitutive analysis in hot working. Mater. Sci. Eng., A 322(21), 4363 (2002).
9.Zener, C. and Hollomon, J.H.: Effect of strain rate upon plastic flow of steel. J. Appl. Phys. 15(1), 2232 (1944).
10.Takuda, H., Fujimoto, H., and Hatta, N.: Modeling on flow stress of Mg–Al–Zn alloys at elevated temperatures. J. Mater. Process. Technol. 80/81(1), 513516 (1998).
11.Galiyev, A., Kaibyshev, R., and Saikai, T.: Continuous dynamic recrystallization in magnesium alloy. Mater. Sci. Forum 419/422, 509514 (2003).
12.Sakai, T. and Jonas, J.J.: Dynamic recrystallization: Mechanical and microstructrural considerations. Acta Mater. 32, 189209 (1984).
13.Prasad, Y.V.R.K. and Sasidhara, S.: Hot working guide: A compendium of hot working maps (ASM, America, 1997).
14.Srinivasan, N., Prasad, Y., and Rama, R.P.: Hot deformation behaviour of Mg–3Al alloy—a study using processing map. Mater. Sci. Eng., A 476(1), 146156 (2008).
15.Prasad, Y.V.R.K. and Seshacharyulu, T.: Hot working maps for hot working of titanium alloys. Mater. Sci. Eng., A 243(15), 8286 (1998).
16.Prasad, Y.V.R.K. and Seshacharyulu, T.: Modeling of hot deformation for microstructural control. Int. Mater. Rev. 43(6), 243258 (1998).



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed