The surface layer degradation of γ-TiAl phase based alloy

• Autorzy: Małecka J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of the present research is to describe the chemical composition and microstructure of the surface layer of Ti-46Al-7Nb-0.7Cr-0,1Si-0.2Ni alloy after the test of isothermal oxidation in 9%O2+0.2%HCl+0.08%SO2+N2 during 250 h. Design/methodology/approach: The objectives were achieved using several techniques including conventional metallography, SEM, BSE, EDX. The oxides scales and their effects were investigated at temperatures 750ºC. Findings: This investigation confirms that the better protection of the substrate was determined using AlCrN coating. Research limitations/implications: The basic limitations concern alloys in a higher temperature and establish the oxidation kinetics of the analysed alloy as a function of time and temperature. Practical implications: One of practical outcomes is to select the coatings which guarantee the reduction of oxidation behavior. It is recommended to use alloys with AlCrN coating. Originality/value: Original value of the paper is assessing of the oxidation resistance of Ti-46Al-7Nb-0.7Cr-0.1Si–0.2Ni-based intermetallic alloy at the conditions combining high temperature and sulphur and chlorine compounds-containing atmosphere. The novelty of this research deals with the mechanism of oxidation at such boundary conditions. This knowledge can support the design of parts made of the intermetallic alloy. The problem considered is currently important for aeroplane and automotive industry, especially for gas turbine manufacturers.

Słowa kluczowe

EN

corrosion; intermetallics; oxidation; sulfidation; coating

PL

korozja; związki międzymetaliczne; utlenianie; siarczkowanie; powlekanie

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2013
• Tom: Vol. 58, nr 1
• Strony: 31--37
• Opis fizyczny: Bibliogr. 36 poz., rys.

Twórcy

autor

Małecka J.

• Opole University of Technology, P.O. Box 321, 45-271 Opole, Poland

Bibliografia

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