Role of Nitrogen During Dry-Air Oxidation of TiAlNbCrSi Alloy Produced with Mould Casting (MC) and Electron Beam Melting (EBM)

• Autorzy: Morgiel Jerzy , Dudziak Tomasz , Maj Łukasz , Kirchner A. , Pomorska Małgorzata , Klöden B. , Weissgärber T. , Toboła Daniel

Identyfikatory

DOI

10.24425/amm.2023.145492

• Języki publikacji: EN

Abstrakty

EN

The lack of room-temperature ductility of high-strength TiAl-based alloys called for complicated high temperature processing limiting their application areas. Introduction of additive manufacturing (AM) methods allowed to circumvent this disadvantage, but entailed microstructure refinement affecting, among the others, their oxidation resistance. The dry-air high temperature oxidation processing of TiAl-based alloys is relatively well covered for coarse grained materials, but to what extent the TiAl alloys are affected by the changes caused by the AM remains to be found out. Additionally, the role of nitrogen during these processes was to large extent omitted in previous works. Within the present experiment, the mould cast (MC) and the electron beam melted (EBM) Ti-48Al-2Nb-0.7Cr-0.3Si (at. %) RNT650 alloys were dry-air oxidized at 650°C for 1000 h. The TEM/EDS investigations allowed to confirm that the scale formed during such treatment consists of the layers occupied predominantly by TiO₂+Al₂O₃/TiO₂/Al₂O₃ sequence. Additionally, it was shown that N diffuses to the sub-scale and reacts with the substrate forming two distinct discontinuous sub-layers of α₂-Ti₃Al(N) and TiN. The scale over EBM was noticeably less porous and nitrogen penetration of the substrate was more extensive, while the MC showed higher susceptibility to local sub-scale oxidation.

Słowa kluczowe

EN

TiAlNbCrSi; dry-air oxidation; TiN; TEM

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2023
• Tom: Vol. 68, iss. 3
• Strony: 1183--1189
• Opis fizyczny: Bibliogr. 13 poz., fot., rys., wykr.

Twórcy

autor

Morgiel Jerzy

• Polish Academy of Science, Institute of Metallurgy and Materials Science, 25 Reymonta Str., 30-059-Kraków, Poland

• https://orcid.org/0000-0003-1807-0149

autor

Dudziak Tomasz

• Łukasiewicz Research Network, Kraków Institute of Technology, 73 Zakopianska Str, 30-418 Kraków, Poland

• https://orcid.org/0000-0003-3901-7531

autor

Maj Łukasz

• Polish Academy of Science, Institute of Metallurgy and Materials Science, 25 Reymonta Str., 30-059-Kraków, Poland

• https://orcid.org/0000-0001-8287-0146

autor

Kirchner A.

• Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM, Institutsteil Dresden Winterbergstrasse 28, 01277 Dresden, Germany

autor

Pomorska Małgorzata

• Polish Academy of Science, Institute of Metallurgy and Materials Science, 25 Reymonta Str., 30-059-Kraków, Poland

• https://orcid.org/0000-0003-2220-2730

autor

Klöden B.

• Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM, Institutsteil Dresden Winterbergstrasse 28, 01277 Dresden, Germany

autor

Weissgärber T.

• Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM, Institutsteil Dresden Winterbergstrasse 28, 01277 Dresden, Germany

autor

Toboła Daniel

• Łukasiewicz Research Network, Kraków Institute of Technology, 73 Zakopianska Str, 30-418 Kraków, Poland

• https://orcid.org/0000-0001-7966-240X

Bibliografia

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