Influence of Al-Si Layer on Structure and Properties of Cast Ni-Based Superalloys


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High-temperature constructional parts of aircraft engines and energy units are exposed to high dynamic stress (fatigue processes and creep) and various temperatures in dioxide-corrosion condition (hot corrosion, oxidation and erosion). The improvement of aero-engine and turbine efficiency is possible through the increase of temperature in front of turbine. This requires the use of heat-resistant and creep-resistant materials, especially nickel-base superalloys which resist mentioned effects for a limited period of time. A deposition of protective layers should improve hot corrosion resistance. This paper is focused on microstructure of protective layers created by codeposition of Al and Si on nickel-base superalloys INCO 713 LC and INCO 738 LC after thermal and thermal-stress exposition and on microstructure of basic materials (substrates). The contribution also shows creep tests results for both superalloys with and without a protective layer.



Materials Science Forum (Volumes 567-568)

Edited by:

Pavel Šandera




S. Hutařová et al., "Influence of Al-Si Layer on Structure and Properties of Cast Ni-Based Superalloys", Materials Science Forum, Vols. 567-568, pp. 273-276, 2008

Online since:

December 2007




[1] W. Seifert, B. Melzer: Rechnerische Auswertung von Zeitstandversuchen am Beispiel des Stahles 13CrMo4-4. 15.: Langzeitverhalten warmfester Stähle und Hochtemperaturwerkstoffe, Düsseldorf (1992).

[2] M. Durand-Charre: The Microstructure of Superalloys. Gordon & Breach Science Publishers, Amsterdam (1997).

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