Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-24T04:12:21.920Z Has data issue: false hasContentIssue false
  • English
  • Français

Hot deformation behavior of a new tailored cobalt-based superalloy for turbine discs

Published online by Cambridge University Press:  22 January 2020

Xiaokang Zhong Open the ORCID record for Xiaokang Zhong [Opens in a new window]  and
Fusheng Han
Xiaokang Zhong*
Affiliation:
Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China; and University of Science and Technology of China, Hefei, Anhui 230026, China
Fusheng Han*
Affiliation:
Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
Get access

Abstract

Hot deformation behavior of a new tailored cobalt-based superalloy for turbine discs was investigated in the temperature range of 1050–1200 °C and the strain rate range of 0.01–10 s−1. The results show that the flow stress is closely related to the deformation temperature and strain rate, and the flow stress curve of the new tailored alloy belongs to a typical dynamic recrystallization (DRX) type. Microstructure observation reveals that the dominant nucleation mechanism of DRX for the new tailored alloy belongs to discontinuous DRX, while continuous DRX only acts as an assistant nucleation mechanism. The optimum processing parameters of hot working are obtained in the temperature range of 1155–1200 °C and the strain rate range of 0.01–0.1 s−1. The activation energy for the new tailored alloy is determined to be 833.0 kJ/mol, and the relationship between grain size and processing parameters is established by appropriate constitutive equations.

Keywords

grain sizemicrostructurestress/strain relationship
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 6 , 30 March 2020 , pp. 633 - 643
Copyright
Copyright © Materials Research Society 2020

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Reed, R.C.: The Superalloys: Fundamentals and Applications (Cambridge University Press, New York, 2006).CrossRefGoogle Scholar
Sims, C.T., Stoloff, N.S., and Hagel, W.C.: Superalloys II (Wiley, New York, 1987).Google Scholar
Sato, J., Omari, T., Oikawa, K., Ohnuma, I., Kainuma, R., and Ishida, K.: Cobalt-base high-temperature alloys. Science 312, 90 (2006).CrossRefGoogle ScholarPubMed
Suzuki, A. and Pollock, T.M.: High-temperature strength and deformation of γ/γ′ two-phase Co–Al–W-base alloys. Acta Mater. 56, 1288 (2008).CrossRefGoogle Scholar
Meher, S., Yan, H.Y., Nag, S., Dye, D., and Banerjee, R.: Solute partitioning and site preference in γ/γ′ cobalt-base alloys. Scr. Mater. 67, 850 (2012).CrossRefGoogle Scholar
Bauer, A., Neumeier, S., Pyczak, F., and Göken, M.: Microstructure and creep strength of different γ/γ′-strengthened Co-base superalloy variants. Scr. Mater. 63, 1197 (2010).CrossRefGoogle Scholar
Eggeler, Y.M., Titus, M.S., Suzuki, A., and Pollock, T.M.: Creep deformation-induced antiphase boundaries in L12-containing single-crystal cobalt-base superalloys. Acta Mater. 77, 352 (2014).CrossRefGoogle Scholar
Klein, L., Bauer, A., Neumeier, S., Göken, M., and Virtanen, S.: High temperature oxidation of γ/γ′-strengthened Co-base superalloys. Corros. Sci. 53, 2027 (2011).CrossRefGoogle Scholar
Shinagawa, K., Omori, T., Oikawa, K., Kainuma, R., and Ishida, K.: Ductility enhancement by boron addition in Co–Al–W high-temperature alloys. Scr. Mater. 61, 612 (2009).CrossRefGoogle Scholar
McDevitt, E.T.: Vacuum induction melting and vacuum arc remelting of Co–Al–W–X gamma-prime superalloys. MATEC Web Conf. 14, 02001 (2014).CrossRefGoogle Scholar
Neumeier, S., Freund, L.P., and Göken, M.: Novel wrought ã/ã′ cobalt base superalloys with high strength and improved oxidation resistance. Scr. Mater. 109, 104 (2015).CrossRefGoogle Scholar
Freund, L.P., Messé, O.M.D.M., Barnard, J.S., Göken, M., Neumeier, S., and Rae, C.M.F.: Segregation assisted microtwinning during creep of a polycrystalline L12-hardened Co-base superalloy. Acta Mater. 123, 295 (2017).CrossRefGoogle Scholar
Gu, Y., Harada, H., Cui, C., Ping, D., Sato, A., and Fujioka, J.: New Ni–Co-base disk superalloys with higher strength and creep resistance. Scr. Mater. 55, 815 (2006).CrossRefGoogle Scholar
Freund, L.P., Giese, S., Schwimmer, D., Höppel, H.W., Neumeier, S., and Göken, M.: High temperature properties and fatigue strength of novel wrought γ/γ′ Co-base superalloys. J. Mater. Res. 32, 4475 (2017).CrossRefGoogle Scholar
Prasad, Y.V.R.K.: Processing maps: A status report. J. Mater. Eng. Perform. 12, 638 (2003).CrossRefGoogle Scholar
Aghaie-Khafri, M. and Adhami, F.: Hot deformation of 15-5 PH stainless steel. Mater. Sci. Eng. A 527, 1052 (2010).CrossRefGoogle Scholar
Yu, Q.Y., Yao, Z.H., and Dong, J.X.: Deformation and recrystallization behavior of a coarse-grain, nickel-base superalloy Udimet720Li ingot material. Mater. Charact. 107, 398 (2015).CrossRefGoogle Scholar
Pu, E., Zheng, W., Song, Z., Feng, H., and Dong, H.: Hot deformation characterization of nickel-based superalloy UNS10276 through processing map and microstructural studies. J. Alloys Compd. 694, 617 (2017).CrossRefGoogle Scholar
Prasad, Y.V.R.K., Gegel, H.L., Doraivelu, S.M., Malas, J.C., Morgan, J.T., Lark, K.A., and Barker, D.R.: Modeling of dynamic material behavior in hot deformation: Forging of Ti-6242. Metall. Trans. A. 15, 1883 (1984).CrossRefGoogle Scholar
Ziegler, H.: “Some Extremum Principles in Irreversible Thermodynamics with Applications to Continuum Mechanics”, in Progress in Solid Mechanics, I.N. Sneddon and R. Hill, ed., Vol. 4, pp. 91-193 (Wiley, New York, 1965).Google Scholar
Prasad, Y.V.R.K. and Seshacharyulu, T.: Modelling of hot deformation for microstructural control. Int. Mater. Rev. 43, 243 (1998).CrossRefGoogle Scholar
Tamura, I.: Some fundamental steps in thermomechanical processing of steels. Trans. Iron Steel Inst. Jpn. 27, 763 (1987).CrossRefGoogle Scholar
Qin, Y.J., Pan, Q.L., He, Y.B., Li, W.B., Liu, X.Y., and Fan, X.: Hot compression behavior and flow stress prediction of ZK60 magnesium alloy. Acta Metall. Sin. 45, 887 (2009).Google Scholar
Cao, Y., Di, H.S., Zhang, J.Q., Zhang, J.C., Ma, T.J., and Misra, R.D.K.: An electron backscattered diffraction study on the dynamic recrystallization behavior of a nickel–chromium alloy (800H) during hot deformation. Mater. Sci. Eng. A 585, 71 (2013).CrossRefGoogle Scholar
Wang, Y., Shao, W., Zhen, L., and Zhang, X.: Microstructure evolution during dynamic recrystallization of hot deformed superalloy 718. Mater. Sci. Eng. A 486, 321 (2008).CrossRefGoogle Scholar
Wu, Y., Zhang, M., Xie, X., Dong, J., Lin, F., and Zhao, S.: Hot deformation characteristics and processing map analysis of a new designed nickel-based alloy for 700 °C A-USC power plant. J. Alloys Compd. 656, 119 (2016).CrossRefGoogle Scholar
Humphreys, F.J. and Hatherly, M.: Recrystallization and Related Annealing Phenomena (Pregamon Press, Oxford, 2004).Google Scholar
Li, D., Guo, Q., Guo, S., Peng, H., and Wu, Z.: The microstructure evolution and nucleation mechanisms of dynamic recrystallization in hot-deformed Inconel 625 superalloy. Mater. Des. 32, 696 (2011).CrossRefGoogle Scholar
Sellars, C.M. and Tegart, W.J.: Hot workability. Int. Metall. Rev. 17, 1 (1972).CrossRefGoogle Scholar
McQueen, H.J. and Ryan, N.D.: Constitutive analysis in hot working. Mater. Sci. Eng. A 322, 43 (2002).CrossRefGoogle Scholar
Satheesh Kumar, S.S., Raghu, T., Bhattacharjee, P.P., Appa Rao, G., and Borah, U.: Constitutive modeling for predicting peak stress characteristics during hot deformation of hot isostatically processed nickel-base superalloy. J. Mater. Sci. 50, 6444 (2015).CrossRefGoogle Scholar
Bi, Z., Zhang, M., Dong, J., Luo, K., and Wang, J.: A new prediction model of steady state stress based on the influence of the chemical composition for nickel-base superalloys. Mater. Sci. Eng., A 527, 4373 (2010).CrossRefGoogle Scholar
Sakai, T.: Dynamic recrystallization microstructures under hot working conditions. J. Mater. Process. Technol. 53, 349 (1995).CrossRefGoogle Scholar