Long-Time Thermal Structural Stability Study on NiCr20TiAl Alloy

Qiu Ying Yu; Zhi Shen; Mai Cang Zhang; Guo Qing Jia; Xi Shan Xie

doi:10.4028/www.scientific.net/AMR.399-401.71

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Long-Time Thermal Structural Stability Study on NiCr20TiAl Alloy
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Long-Time Thermal Structural Stability Study on NiCr20TiAl Alloy

Abstract:

The coarsening kinetics of main strengthening phase γ′ and the growth behavior of grain boundary carbides have been investigated on NiCr20TiAl alloy aged at 550~750°C for 200~10,000h. The precipitates of NiCr20TiAl alloy at standard heat treatment condition are γ′, M₇C₃, M₂₃C₆ and MC. The coarsening of γ′ precipitates proceeds by Ostwald ripening controlled by volume diffusion in the alloy. Grain boundary carbides M23C6 and M7C3 increase with ageing times and temperatures. The morphologies of precipitates after long-time ageing almost remain the same as that at standard heat treatment condition except 750°C.

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Periodical:

Advanced Materials Research (Volumes 399-401)

Pages:

71-75

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.399-401.71

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Online since:

November 2011

Authors:

Qiu Ying Yu, Zhi Shen, Mai Cang Zhang, Guo Qing Jia, Xi Shan Xie

Keywords:

Carbide, Long-Time Ageing, NiCr20TiAl Alloy, γ' Phase

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References

[1] W. Betteridge, and J. Heslop: The Nimonic Alloys (2nd edition, Edward Amkld 1974).

Google Scholar

[2] S. Kameswari: J. Therm. Anal. vol. 31(1986), p.813

Google Scholar

[3] K. K. Dong, Y. K. Dong, H. R. Seog and J. K. Dong: J. Mater. Process. Technol. vol. 113 (2001), p.148

Google Scholar

[4] H. W. Shen, W. L. Wang, Z. Z. Wang, L. H. Zhang, X. S. Xie and S. H. Fu, in: Advances in Materials technology for fossil power plants: proceedings from the fifth international conference, edited by R. Viswanathan, D. Gandy and K. Coleman, section, 3, Electric Power Research Institute, Inc (2008).

Google Scholar

[5] R.A. MacKay, M.V. Nathal: Acta Metall. Mater. vol. 38(1990) P. 993

Google Scholar

[6] H.T. Kim, S.S. Chun, X.X. Yao, et al: J. Mater. Sci. vol. 32 (1997) P. 4917

Google Scholar

[7] K. Kusabiraki, X.M. Zhang, T. Ooka: ISIJ Int. vol. 35 (1995) P. 1115

Google Scholar