Effects of Microstructures on Strength and Fatigue Properties of Long-Term-Serviced F12 Steels

X.M. Wu; G.P. Zhang; J.Q. Zhang; W.G. Chen

doi:10.4028/www.scientific.net/KEM.353-358.295

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 353-358Effects of Microstructures on Strength and Fatigue...

Effects of Microstructures on Strength and Fatigue Properties of Long-Term-Serviced F12 Steels

Abstract:

Microstructures of long-term serviced F12 steel exposed at 545 °C have been investigated by electron microscopes. The hardness of the material was measured to be correlated with the variation of the microstructures. Fatigue properties of the material with different running time were evaluated and analyzed. The experimental results show that the coarsening of the precipitated carbides along boundaries and the formation of subgrains accelerate the degradation of the long-term creep properties of the steel. Fatigue crack initiation threshold from a notch linearly deceases with increasing the running time due to the variation of the distribution and the shape of the precipitated carbides. The degradation mechanisms of the F12 steel during their long-term service at high temperature are discussed.

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Periodical:

Key Engineering Materials (Volumes 353-358)

Pages:

295-298

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.353-358.295

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Online since:

September 2007

Authors:

X.M. Wu, G.P. Zhang, J.Q. Zhang, W.G. Chen

Keywords:

F12 Steel, Fatigue, Microstructure, Strength

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References

[1] L. M Wyatt: Mater. Sci. Eng. Vol. 7 (1971) p.237.

Google Scholar

[2] N. S. Cheruvu: Metall. Trans. A, Vol. 20A (1989) p.87.

Google Scholar

[3] K. R. Williams and B. Wilshire: Mater. Sci. Eng. Vol. 47 (1983) p.845.

Google Scholar

[4] J. W. Schinkel, P. L. F. Radermakers, B. R. Drenth and C. P. Scheepens: J. Heat Treat. Vol. 3 (1984) p.237.

Google Scholar

[5] G. Eggeler, N. Nilsvang and B. Ilschner: Steel Res. Vol. 58 (1987) p.97.

Google Scholar

[6] G. Eggeler: Acta Metall. Vol. 37 (1989) p.3225.

Google Scholar

[7] A. Joarder, D. S. Sarma and N. S. Cheruvu: Metall. Trans. A Vol. 22A (1991) p.1811.

Google Scholar

[8] Y. Qin, G. Götz and W. Blum: Mater. Sci. Eng. A Vol. 341 (2003) p.211.

Google Scholar

[9] G. Götz and W. Blum: Mater. Sci. Eng. A Vol. 348 (2003) p.201.

Google Scholar

[10] Z. F. Hu and Z. G. Yang: Mater. Sci. Eng. A Vol. 383 (2004) p.224.

Google Scholar

[11] G. P. Zhang, Z. G. Wang and G. Y. Li: Acta Mater. Vol. 45 (1997) p.1705 Fig. 4 Fatigue crack initiation threshold from the notch of the F12 steels as a function of running time.

Google Scholar