Structural aspects of corrosion resistance in alloys based on the Fe3Al intermetallic phase in the cast state

• Autorzy: Lachowicz M. M. , Haimann K. , Lachowicz M. B. , Jasionowski R. , Pawlak S.
• Języki publikacji: EN

Abstrakty

EN

This paper presents the results of investigation of four cast alloys based on the Fe3Al intermetallic phase. Microstructure tests using light microscopy, electron scanning microscopy and X-ray diffraction methods, have been performed. On this basis, a presence of particles rich in zirconium and molybdenum, and in case of the alloy with 28 at.% aluminium and 5 at.% chromium - the presence of sigma phase (FeCr), has been found. Also, the results of the study of the microstructure influence on the electrochemical corrosion resistance in the 5 % NaCl solution have been presented. The Fe-26Al-2Cr-1Mo-0.1Zr-0.005B at.% and Fe-26Al-5Cr-1Mo-0.1Zr-0.005B at.% alloys exhibited increased corrosion resistance in comparison to the Fe-23Al-1Mo-0.1Zr-0.005B at.% alloy without chromium addition. The appearance of the sigma phase in the alloy of Fe-28Al-5Cr-1Mo-0.1Zr-0.005B at.% chemical composition resulted in lowering the corrosion resistance of this alloy and a change in corrosion character from the pitting to the intercrystalline one.

Słowa kluczowe

EN

Fe3Al based iron aluminides; microstructure; electrochemical corrosion; sigma phase

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2012
• Tom: Vol. 30, No. 3
• Strony: 217--225
• Opis fizyczny: Bibliogr. 11 poz.

Twórcy

autor

Lachowicz M. M.

autor

Haimann K.

autor

Lachowicz M. B.

autor

Jasionowski R.

autor

Pawlak S.

• Institute of Materials Science and Applied Mechanics, Wroclaw University of Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland

Bibliografia

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