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

Abstract:

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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.

Info:

Periodical:

Materials Science Forum (Volumes 567-568)

Edited by:

Pavel Šandera

Pages:

273-276

DOI:

10.4028/www.scientific.net/MSF.567-568.273

Citation:

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

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Price:

$35.00

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