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Effects of cold rolling on the precipitation and the morphology of δ-phase in Inconel 718 alloy

Published online by Cambridge University Press:  15 February 2016

Yunpeng Mei ,
Chenxi Liu ,
Yongchang Liu ,
Xiaosheng Zhou ,
Liming Yu ,
Chong Li ,
Zongqing Ma  and
Yuan Huang
Yunpeng Mei
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Chenxi Liu
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Yongchang Liu*
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Xiaosheng Zhou
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Liming Yu
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Chong Li*
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Zongqing Ma
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Yuan Huang
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

To investigate the effects of cold rolling on the microstructure, the precipitation behavior and the morphology of δ-phase, Inconel 718 alloy samples with different cold rolling reductions were aged for different periods at temperatures range from 850 °C to 1000 °C. Detailed microstructural observations and quantitative measurements were conducted to characterize the evolution of the δ-phase during aging. The results show that the microstructure consists of large deformed grains as a result of a slow static recovery at the low aging temperatures (850 and 900 °C); whereas the austenite matrix is fully recrystallized at the high aging temperatures (950 and 1000 °C). It is also found that the amount of δ-phase and the number density of spherical δ-phase particles increase with the increase in the degree of cold rolling both at low and high aging temperatures. With respect to different microstructural changes for the cold-rolled samples at the low or the high aging temperatures, two distinct mechanisms have been, respectively, introduced to interpret the changes in the precipitation behavior and the appearance of δ-phase.

Keywords

cold workingphase transformationNi
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 4 , 29 February 2016 , pp. 443 - 454
Copyright
Copyright © Materials Research Society 2016 

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References

REFERENCES

Cao, X., Rivaux, B., Jahazi, M., Cuddy, J., and Birur, A.: Effect of pre- and post-weld heat treatment on metallurgical and tensile properties of Inconel 718 alloy butt joints welded using 4 kW Nd:YAG laser. J. Mater. Sci. 44, 4557 (2009).CrossRefGoogle Scholar
Rao, G.A., Kumar, M., Srinivas, M., and Sarma, D.S.: Effect of standard heat treatment on the microstructure and mechanical properties of hot isostatically pressed superalloy Inconel 718. Mater. Sci. Eng., A 355, 114 (2003).CrossRefGoogle Scholar
Huang, Y. and Langdon, T.G.: The evolution of delta-phase in a superplastic Inconel 718 alloy. J. Mater. Sci. 42, 421 (2007).CrossRefGoogle Scholar
Azadian, S., Wei, L.Y., and Warren, R.: Delta phase precipitation in Inconel 718. Mater. Charact. 53, 7 (2004).CrossRefGoogle Scholar
Lin, Y.C., Deng, J., Jiang, Y.Q., Wen, D.X., and Liu, G.: Effects of initial δ phase on hot tensile deformation behaviors and fracture characteristics of a typical Ni-based superalloy. Mater. Sci. Eng., A 598, 251 (2014).CrossRefGoogle Scholar
Slama, C. and Abdellaoui, M.: Structural characterization of the aged Inconel 718. J. Alloys Compd. 306, 277 (2000).CrossRefGoogle Scholar
Sudararaman, M., Mukhopadhyay, P., and Banerjee, S.: Precipitation of the δ-Ni3Nb phase in two nickel base superalloys. Metall. Trans. A 19, 453 (1988).CrossRefGoogle Scholar
Liu, W.C., Xiao, F.R., Yao, M., Chen, Z.L., Jiang, Z.Q., and Wang, S.G.: The influence of cold rolling on the precipitation of delta phase in Inconel 718 alloy. Scr. Mater. 37, 53 (1997).CrossRefGoogle Scholar
Singh, R.P., Hyzak, J.M., Howson, T.E., and Biederman, R.R.: Recrystallization behavior of cold rolled alloy 718. In Superalloy 718, 625 and Various Derivatives, Loria, E.A. ed.; The Minerals, Metals & Materials Society: Pennsylvania, 1991; p. 205.CrossRefGoogle Scholar
Burger, J.L., Biederman, R.R., and Couts, W.H.: The effects of starting condition on the aging response of as-forged alloy 718. In Superalloy 718—Metallurgy and Applications, Loria, E.A. ed.; The Minerals, Metals & Materials Society: Pennsylvania, 1989; p. 207.CrossRefGoogle Scholar
Liu, W.C., Chen, Z.L., and Yao, M.: Effect of cold rolling on the precipitation behavior of δ phase in Inconel 718. Metall. Mater. Trans. A 30, 31 (1999).CrossRefGoogle Scholar
Liu, W.C., Yao, M., and Chen, Z.L.: Recrystallization behavior of cold rolled Inconel 718 alloy. J. Aeronaut. Mater. 16, 33 (1996).Google Scholar
Praveen, K.V.U., Sastary, G.V.S., and Singh, V.: Work-hardening behavior of the Ni-Fe based superalloy IN718. Metall. Mater. Trans. A 39, 65 (2008).CrossRefGoogle Scholar
Paulonis, D.F., Oblak, J., and Duvall, D.S.: Precipitation in nickel-base alloy 718. Trans. Quart. 62, 611 (1969).Google Scholar
Kirman, I. and Warrington, D.H.: The precipitation of Ni3Nb phases in a Ni-Fe-Cr-Nb alloy. Metall. Trans. 1, 2667 (1970).CrossRefGoogle Scholar
Cozar, R. and Pineau, A.: Morphology of γ′ and γ″ precipitates and thermal stability of Inconel 718 type superalloys. Metall. Mater. Trans. B 4, 47 (1972).CrossRefGoogle Scholar
Oblak, J.M., Paulonis, D.F., and Duvall, D.S.: Coherency strengthening in Ni base alloys hardened by D022 γ″ precipitates. Metall. Trans. A 5, 143 (1974).CrossRefGoogle Scholar
Sundararaman, M., Mukhopadhyay, P., and Banerjee, S.: Some aspects of the precipitation of metastable intermetallic phases in Inconel 718. Metall. Trans. A 23, 2015 (1992).CrossRefGoogle Scholar
Lee, H.T. and Hou, W.H.: Fine grains forming process, mechanism of fine grain formation and properties of superalloy 718. Mater. Trans. 53, 716 (2012).CrossRefGoogle Scholar
Mei, Y.P., Liu, Y.C., Liu, C.X., Li, C., Yu, L.M., Guo, Q.Y., and Li, H.J.: Effects of cold rolling on the precipitation kinetics and the morphology evolution of intermediate phases in Inconel 718 alloy. J. Alloys Compd. 649, 949 (2015).CrossRefGoogle Scholar
Cai, D.Y., Zhang, W.H., Nie, P.L., Liu, W.C., and Yao, M.: Dissolution kinetics of δ phase and its influence on the notch sensitivity of Inconel 718. Mater. Charact. 58, 220 (2007).CrossRefGoogle Scholar
Desvallees, Y., Bouzidi, M., Bois, F., and Beaude, N.: Delta phase in Inconel 718: Mechanical properties and forging process requirements. In Superalloy 718, 625, 706 and Various Derivatives, Loria, E.A. ed.; The Minerals, Metals & Materials Society: Pennsylvania, 1994; p. 281.CrossRefGoogle Scholar