Dendrite Growth in Selector-Root Area of Single Crystal CMSX-4 Turbine Blades

• Authors: W. Bogdanowicz , A. Tondos , J. Krawczyk , R. Albrecht , J. Sieniawski
• Languages of publication: EN

Abstracts

EN

The single crystal turbine blades made of CMSX-4 nickel-based superalloy were studied. The turbine blades were obtained by the Bridgman technique with withdrawal rate of 5 mm/min. The samples, cut-off from root part of blades and containing the fragment of the selector, were studied. The effect of selector geometry on the dendrites growth and defects formation in the selector-root area of the blade were analyzed. The Laue diffraction, scanning electron microscopy, and X-ray diffraction topography were applied. It was found that, during crystallization of the selector, the dendrite cores, after reaching the surface of mould, may bend, if the angle between dendrite cores and the mould surface was equal to 12°. When the angle was equal to 24° the growth of dendrites has been stopped. It can be stated that the defects, which appeared in the selector were inherited by the root part.

Keywords

EN

61.66.Dk; 61.72.-y; 61.10.Nz

Discipline

• 61.72.-y: Defects and impurities in crystals; microstructure(for radiation induced defects, see 61.80.-x; for defects in surfaces, interfaces, and thin films, see 68.35.Dv and 68.55.Ln; see also 85.40.Ry Impurity doping, diffusion, and ion implantation technology; for effects of crystal defects and doping on superconducting transition temperature, see 74.62.Dh)
• 61.66.Dk: Alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2016
• Volume: 130
• Issue: 4
• Pages: 1107-1109

Dates

published

2016-10

Contributors

author

W. Bogdanowicz

• University of Silesia, Institute of Materials Science, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland

author

A. Tondos

• University of Silesia, Institute of Materials Science, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland

author

J. Krawczyk

• University of Silesia, Institute of Materials Science, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland

author

R. Albrecht

• University of Silesia, Institute of Materials Science, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland

author

J. Sieniawski

• Rzeszów University of Technology, Department of Materials Science, W. Pola 2, 35-959 Rzeszów, Poland

References

• [1] H.J. Dai, N. D'Souza, H.B. Dong, Metall. Mater. Trans. A 42, 3430 (2011), doi: 10.1007/s11661-011-0760-6
• [2] J.R. Davis, Heat-Resistant Materials, ASM International, Materials Park (OH) 1997
• [3] W. Bogdanowicz, Scr. Mater. 37, 829 (1997), doi: 10.1016/S1359-6462(97)00169-3
• [4] R.C. Reed, The Superalloys. Fundamentals and Applications, Cambridge University Press, Cambridge 2006, doi: 10.1017/CBO9780511541285
• [5] D.C. Zipperian, Metallographic Handbook, Chief Technical Officier PACE Technologies, Tucson (AR) 2011
• [6] W. Bogdanowicz, R. Albrecht, A. Onyszko, J. Sieniawski, Solid State Phenom. 203-204, 63 (2013), doi: 10.4028/www.scientific.net/SSP.203-204.63

Identifiers

DOI

10.12693/APhysPolA.130.1107