TEM Analyses of Microstructure Evolution in Ex-Service Single Crystal CMSX-4 Gas Turbine Blade

Beata Dubiel; Aleksandra Czyrska-Filemonowicz

doi:10.4028/www.scientific.net/SSP.186.139

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HomeSolid State PhenomenaSolid State Phenomena Vol. 186TEM Analyses of Microstructure Evolution in...

TEM Analyses of Microstructure Evolution in Ex-Service Single Crystal CMSX-4 Gas Turbine Blade

Abstract:

TEM studies of the ex-service single crystal blade were performed to analyse the microstructural changes which control the degradation of the CMSX-4 superalloy during its exposure in a gas turbine. Microstructural analyses were focused mainly on evolution of the γ-γ’ morphology and examination of dislocation configurations in particular parts of the blade. Between the bottom and tip locations of the blade a pronounced differences in γ-γ’ morphology were observed. TEM analysis of the dislocation substructure showed that at the bottom of the blade the dislocation slip is mainly confined to the horizontal γ channels. Increasing of the temperature and decreasing of stress along the blade height resulted in the γ-γ’ rafting, formation of dislocation networks and intensification of the dislocation climb in vertical γ channels.

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Periodical:

Solid State Phenomena (Volume 186)

Pages:

139-142

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.186.139

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Online since:

March 2012

Authors:

Beata Dubiel, Aleksandra Czyrska-Filemonowicz

Keywords:

Creep, Single Crystal Superalloy, γ-Phase

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References

[1] R.C. Reed: The Superalloys. Fundamentals and applications (Cambridge University Press, 2006).

Google Scholar

[2] D. Dye, A. Ma and R.C Reed, in: Superalloys 2008, edited by R.C. Reed et al., The Minerals, Metals and Materials Society TMS (2008) p.911.

Google Scholar

[3] T.M. Pollock, R.D. Field, in: Dislocations and High-Temperature Plastic Deformation of Superalloy Single Crystals, edited by F.R. Nabarro and M.S. Duesberry, volume 11 of Dislocations in Solids, chapter 63, Elsevier Science BV, Amsterdam (2002).

DOI: 10.1016/s1572-4859(02)80014-6

Google Scholar

[4] J.W. Edington: Practical Electron Microscopy in Material Science, volume 4, Macmillan and Phillips Electron Optics Publishing Group (1975).

Google Scholar

[5] D.B. Williams, C.B. Carter: Transmission Electron Microscopy (Plenum Press New York 2009).

Google Scholar

[6] H. Murghrabi: Materials Science and Technology Vol. 25 (2009), p.191.

Google Scholar

[7] R. D. Field, T. M. Pollock, W. H. Murphy, in: Superalloys 1992, edited by S. D. Antolovich et al., The Minerals, Metals and Materials Society TMS (1992) p.557.

Google Scholar

[8] A. Epishin, T. Link, U. Brückner, P. D. Portella: Acta Materialia Vol. 49 (2001), p.4017.

Google Scholar