Effect of Melt Treatment on the Microstructure and Creep-Rupture Behavior of M963 Cast Nickel-Base Superalloy

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The effect of melt treatment on the microstructure and creep-rupture behavior of M963 superalloy at 1248K under 225MPa has been investigated. The microstructure of the as-cast superalloy without melt treatment consists of γ solid solution matrix, γ´precipitate, coarse blocky MC carbide and (γ+γ´)eutectic. The striking difference in microstructure is that the melt treatment changes the MC carbide from the coarse blocky morphology into the fine script-like morphology. After heat-treated at 1483K for 4h followed by air-cooling, both the creep life and rupture elongation of the melt-treated alloy are all doubled those of the alloy without melt treatment. The mechanism of the melt treatment on the creep-rupture behavior of the M963 superalloy is discussed.

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Periodical:

Materials Science Forum (Volumes 449-452)

Edited by:

S.-G. Kang and T. Kobayashi

Pages:

553-556

Citation:

H. R. Guan et al., "Effect of Melt Treatment on the Microstructure and Creep-Rupture Behavior of M963 Cast Nickel-Base Superalloy", Materials Science Forum, Vols. 449-452, pp. 553-556, 2004

Online since:

March 2004

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$41.00

[1] V. P. Manov, S. I. Popel, P. I. Buler, A. B. Manukhin, and D. G. Komlev: Mater. Sci. Eng. A, Vol. 133 (1991), p.535.

[2] X. F. Bian and W. M. Wang: Mater. Lett., Vol. 44 (2000), p.54.

[3] X. F. Bian, H. Li, L. Zhang, J. J. Ma and T. Max: Chin. Sci. Bull., Vol. 41 (1996), p.873.

[4] C. Yuan, X. F. Sun, F. S. Yin, H. R. Guan, Z. Q. Hu, Q. Zheng and Y. Yu: J. Mater. Sci. Technol., Vol. 17 (2001), p.425.

[5] F. S. Yin, X. F. Sun, J. G. Li, H. R. Guan and Z. Q. Hu: Scr. Mater., Vol. 48 (2003), p.425.

[6] F. S. Yin, C. Yuan, X. F. Sun, H. R. Guan and Z. Q. Hu: Heat Treat. Met., Vol. 26 (2001), p.1.

[7] F. S. Yin, X. F. Sun, C. Yuan, H. R. Guan and Z. Q. Hu: Trans. Nonferrous Met. Soc. China, Vol. 12 (2002), p.83.

[8] F. S. Yin, X. F. Sun, X. B. Qin, S. J. Cheng, H. R. Guan and Z. Q. Hu: Acta Metall. Sinica, Vol. 39 (2003), p.530.

[9] C.T. Sims: J. Met., Vol. 18 (1966), p.1119.

[10] H. E. Gresham: Met., Vol. 3 (1969), p.433.