Skip to main content Accessibility help
×
Home

Influence of W, Re, Cr, and Mo on microstructural stability of the third generation Ni-based single crystal superalloys

  • Bo Wang (a1), Jun Zhang (a1), Taiwen Huang (a1), Haijun Su (a1), Zhuoran Li (a1), Lin Liu (a1) and Hengzhi Fu (a1)...

Abstract

The effects of W, Re, Cr, and Mo on microstructural stability, such as the morphology of γ′ phase and the topologically close-packed (TCP) phase precipitation are systematically investigated in eleven kinds of Ni-based single crystal superalloys containing certain amounts of Co, Al, and Ta. After heat treatment, all the designed alloys show different sizes of γ′ phases with typical cuboidal morphology occupying 75% of the total volume. With increasing Re content, the size of γ′ decreases obviously, while the size of γ′ decreases slightly with increasing Cr and Mo contents. Increasing W does not affect the size of γ′. As a result of thermal exposure at 1000 °C for 1000 h, some acicular, rod-like, and blocky TCP phases are precipitated in most alloys. It is noted that Mo and Re can strongly promote the precipitation of TCP phase, but W has no obvious effect on TCP phase precipitation. In addition, transmission electron microscope analysis indicates that these TCP phases are σ phase, μ phase, and R phase.

Copyright

Corresponding author

a) Address all correspondence to this author. e-mail: zhjscott@nwpu.edu.cn

Footnotes

Hide All

Contributing Editor: Mathias Göken

Footnotes

References

Hide All
1. Reed, R.C., Tao, T., and Warnken, N.: Alloys-by-design: Application to nickel-based single crystal superalloys. Acta Mater. 57, 5898 (2009).
2. Guo, J.T.: The current situation of application and development of superalloys in the fields of energy industry. Acta Metall. Sin. 46, 513 (2010).
3. Caron, P.: High γ′ solvus new generation nickel-based superalloys for single crystal turbine blade applications. In Superalloys 2000, Pollock, T.M., Kissinger, R.D., Bowman, R.R., Green, K.A., Mclean, M., Oison, S., and Schirra, J.J. eds.; TMS: Warrendale, 2000; p. 737.
4. Hu, Z.Q., Liu, L.R., Jin, T., and Sun, X.F.: Development of the Ni-base single crystal superalloys. Aeroengine 31, 1 (2005).
5. Walston, S., Cetel, A., Mackay, R., O'Hara, K., Duhl, D., and Dreshfield, R.: Joint development of a fourth generation single crystal superalloy. In Superalloys 2004, Green, K.A., Pollock, T.M., Harada, H., Howson, T.E., Reed, R.C., Schirra, J.J., and Walston, S. eds.; TMS: Warrendale, 2004; p. 1.
6. Sato, A., Yeh, A.C., Kobayashi, T., Yokokawa, T., Harada, H., Murakumo, T., and Zhang, J.X.: Fifth generation Ni based single crystal superalloy with superior elevated temperature properties. Energy Mater. 2, 19 (2007).
7. Rae, C.M.F. and Reed, R.C.: The precipitation of topologically close-packed phases in rhenium-containing superalloys. Acta Mater. 49, 4113 (2001).
8. Karunaratne, M.S.A., Rae, C.M.F., and Reed, R.C.: On the microstructural instability of an experimental nickel-based single-crystal superalloy. Metall. Mater. Trans. A 32, 2409 (2001).
9. Acharya, M.V. and Fuchs, G.E.: The effect of long-term thermal exposures on the microstructure and properties of CMSX-10 single crystal Ni-base superalloys. Mater. Sci. Eng., A 381, 143 (2004).
10. Lavigne, O., Ramusat, C., Drawin, S., Caron, P., Boivin, D., and Pouchou, J.L.: Relationships between microstructural instabilities and mechanical behaviour in new generation nickel-based single crystal superalloys. In Superalloys 2004, Green, K.A., Pollock, T.M., Harada, H., Howson, T.E., Reed, R.C., Schirra, J.J., and Walston, S. eds.; TMS: Warrendale, 2004; p. 667.
11. Walston, W.S., O'Hara, K.S., Ross, E.W., Pollock, T.M., and Murphy, W.H.: René N6: Third generation single crystal superalloy. In Superalloys 1996, Kissinger, R.D., Deye, D.J., Anton, D.L., Cetel, A.D., Nathal, M.V., Pollock, T.M., and Woodford, D.A. eds.; TMS: Warrendale, 1996; p. 27.
12. Sato, A., Harada, H., Yen, A.C., Kawagishi, K., Kobayashi, T., Koizumi, Y., Yokokawa, T., and Zhang, J.X.: A 5th generation SC superalloy with balanced high temperature properties and processability. In Superalloys 2008, Reed, R.C., Green, K.A., Caron, P., Gabb, T.P., Fahrmann, M.G., Huron, E.S., and Woodard, S.A. eds.; TMS: Warrendale, 2008; p. 131.
13. Hobbs, R.A., Brewster, G.J., Rae, C.M.F., and Tin, S.: Evaluation of ruthenium-bearing single crystal superalloys—A design of experiments. In Superalloys 2008, Reed, R.C., Green, K.A., Caron, P., Gabb, T.P., Fahrmann, M.G., Huron, E.S., and Woodard, S.A. eds.; TMS: Warrendale, 2008; p. 171.
14. Hu, P.P., Chen, J.Y., Fen, Q., Chen, Y.H., Cao, L.M., and Li, X.H.: Effects of Mo on microstructure and stress-rupture property of Ni-based single crystal superalloys. Trans. Nonferr. Metal. Soc. 21, 332 (2011).
15. Ma, W.Y., Han, Y.F., Li, S.S., Zheng, Y.R., and Gong, S.K.: Effect of Mo content on the microstructure and stress rupture of a Ni base single crystal superalloy. Acta Metall. Sin. 42, 1191 (2006).
16. Cheng, K.Y., Jo, C.Y., Jin, T., and Hu, Z.Q.: Effect of Re on the precipitation behavior of μ phase in several single crystal superalloys. J. Alloys Compd. 536, 7 (2012).
17. Wang, W.Z., Jin, T., Liu, J.L., Sun, X.F., Guan, H.R., and Hu, Z.Q.: Role of Re and Co on microstructures and γ′ coarsening in single crystal superalloys. Mater. Sci. Eng., A 479, 148 (2008).
18. Tian, S.G., Qian, B.J., Li, T., Yu, L.L., Xie, J., and Wang, M.G.: Evolution and analysis of TCP phase in a single crystal nickel-based superalloy containing Re during aging. Rare Metals 30, 452 (2011).
19. Mackay, R.A., Gabb, T.P., Garg, A., Rogers, R.B., and Nathal, M.V.: Influence of composition on microstructural parameters of single crystal nickel-base superalloys. Mater. Charact. 70, 83 (2012).
20. Liu, L.R., Sun, L.J., and Zu, G.Q.: Effect of mass fraction of Re element on microstructure and properties of single crystal superalloy. J. Shenyang Univ. Technol. 35, 525 (2013).
21. Nathal, M.V., Maier, R.D., and Ebert, L.J.: The influence of cobalt on the microstructure of the nickel-base superalloy MAR-M247. Metall. Trans. A 13, 1775 (1982).
22. Nathal, M.V. and Ebert, L.J.: The influence of cobalt, tantalum, and tungsten on the microstructure of single crystal nickel-base superalloys. Metall. Trans. A 16, 1849 (1985).
23. Chen, J.Y., Zhao, B., Feng, Q., Cao, L.M., and Sun, Z.Q.: Effects of Ru and Cr on γ/γ′ microstructural evolution of Ni-based single crystal superalloys during heat treatment. Acta Metall. Sin. 46, 897 (2010).
24. Shi, L.P., Wang, W.B., Feng, Q., Wang, Y.L., and Chen, G.L.: Effects of high Ru and high Cr on the microstructural stability of Ni-base superalloys. J. Univ. Sci. Technol. B. 30, 1362 (2008).
25. Tan, X.P., Liu, J.L., Jin, T., Sun, X.F., and Hu, Z.Q.: Influence of Cr addition on microstructure of a 5% Re-containing single crystal nickel-based superalloy. Trans. Nonferr. Metal. Soc. 21, 1004 (2011).
26. Caron, P. and Khan, T.: Evolution of Ni-based superalloys for single crystal gas turbine blade applications. Aerosp. Sci. Technol. 3, 513 (1999).
27. Koizumi, Y., Koguchi, H., Yokokawa, T., Kobayashi, T., Osawa, M., Kimura, T., and Harada, H.: Effect of Ru additions on the TCP-phase formation and creep strength of a Ni-base single crystal superalloy. J. Jpn. Inst. Met. 68, 54 (2004).
28. Tan, X.P., Liu, J.L., Jin, T., Hu, Z.Q., Hong, H.U., Choi, B.G., Kim, I.S., Yoo, Y.S., and Jo, C.Y.: Effect of ruthenium on precipitation behavior of the topologically close-packed phase in a single-crystal Ni-based superalloy during high-temperature exposure. Metall. Mater. Trans. A 43, 3608 (2012).
29. Carroll, L.J., Feng, Q., Mansfield, J.F., and Pollock, T.M.: Elemental partitioning in Ru-containing nickel-base single crystal superalloys. Mater. Sci. Eng., A 457, 292 (2007).
30. Reed, R.C., Cox, D.C., and Rae, C.M.F.: Damage accumulation during creep deformation of a single crystal superalloy at 1150 °C. Mater. Sci. Eng., A 448, 88 (2007).
31. Popova, M.A., Kuznetsov, V.P., Lesnikov, V.P., Popov, N.A., and Konakova, I.P.: The structure and mechanical properties of single-crystal nickel alloys with Re and Ru after high-temperature holds. Mater. Sci. Eng., A 642, 304 (2015).
32. Nathal, M.V. and Ebert, L.J.: The influence of cobalt, tantalum, and tungsten on the elevated temperature mechanical properties of single crystal nickel-base superalloys. Metall. Trans. A 16, 1863 (1985).
33. Lifshitz, I.M. and Slyozov, V.V.: The kinetics of precipitation from supersaturated solid solutions. J. Phys. Chem. Solids 1–2, 35 (1961).
34. Wagner, C.: Theorie der altering von niederschlägen durch umlösen. Z. Elektrochem. 7–8, 581 (1961).
35. Karunaratne, M.S.A., Cox, D.C., Carter, P., and Reed, R.C.: Modelling of the microsegregation in CMSX-4 superalloy and its homogenization during heat treatment. In Superalloys 2000, Pollock, T.M., Kissinger, R.D., Bowman, R.R., Green, K.A., Mclean, M., Oison, S., and Schirra, J.J. eds.; TMS: Warrendale, 2000; p. 263.
36. Liu, G., Liu, L., Zhang, S.X., Yang, C.B., Zhang, J., and Fu, H.Z.: Effect of Re and Ru on microstructure and segregation of Ni-based single crystal superalloys. Acta Metall. Sin. 48, 845 (2012).
37. Tian, S.G., Wang, M.G., Li, T., Qian, B.J., and Xie, J.: Influence of TCP phase and its morphology on creep properties of single crystal nickel-based superalloys. Mater. Sci. Eng., A 527, 5444 (2010).
38. Murphy, H.J., Sims, C.T., and Beltran, A.M.: PHACOMP revisited. J. Metals 11, 47 (1968).
39. Morinaga, M., Yukawa, N., Adachi, H., and Ezaki, H.: New PHACOMP and its applications to alloy design. In Superalloys 1984, TMS: Warrendale, 1984; p. 523.
40. Chen, Z.Q., Han, Y.F., Zhong, Z.G., Wei, P.Y., and Yan, M.G.: New phase stability prediction method of nickel base single crystal superalloys. J. Aeronaut. Mater. 18, 13 (1998).
41. Wen, T., Li, J.G., Liu, L.R., Chen, L.J., and Jin, T.: Effect of long-term aging on microstructure evolution and stress rupture properties of Ni-based single crystal superalloy. Rare Met. Mater. Eng. 41, 230 (2012).
42. Qin, X.Z., Guo, J.T., Yuan, C., Yang, G.X., Zhou, L.Z., and Ye, H.Q.: μ-Phase behavior in a cast Ni- base superalloy. J. Mater. Sci. 44, 4840 (2009).

Keywords

Related content

Powered by UNSILO

Influence of W, Re, Cr, and Mo on microstructural stability of the third generation Ni-based single crystal superalloys

  • Bo Wang (a1), Jun Zhang (a1), Taiwen Huang (a1), Haijun Su (a1), Zhuoran Li (a1), Lin Liu (a1) and Hengzhi Fu (a1)...

Metrics

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.