Scale mass gain, morphology and phase composition of air and steam oxidized electron beam melted and cast Ti-48Al-2Nb-0.7Cr-0.3Si alloys

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Thomas Dudziak - , Łukasiewicz Research Network, Krakow Technology Institute (Autor:in)
  • Ewa Rzad - , Łukasiewicz Research Network, Krakow Technology Institute (Autor:in)
  • Jerzy Morgiel - , Institute of Metallurgy and Materials Science of Polish Academy of Sciences (Autor:in)
  • Magdalena Wytrwal-Sarna - , AGH University of Science and Technology (Autor:in)
  • Alexander Kirchner - , Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung (Autor:in)
  • Małgorzata Pomorska - , Institute of Metallurgy and Materials Science of Polish Academy of Sciences (Autor:in)
  • Łukasz Boroń - , Łukasiewicz Research Network, Krakow Technology Institute (Autor:in)
  • Tomasz Polczyk - , Łukasiewicz Research Network, Krakow Technology Institute (Autor:in)
  • Grzegorz Jan Moskal - , Schlesische Technische Universität (Autor:in)
  • Daniel Toboła - , Łukasiewicz Research Network, Krakow Technology Institute (Autor:in)
  • Burghardt Klöden - , Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung (Autor:in)
  • Thomas Weißgärber - , Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung (Autor:in)

Abstract

Oxidation resistance of γ - TiAl alloy RNT650 exposed to air and steam at 650 °C for 1000 h is reported. The samples were prepared either by conventional casting (CM) or electron beam melting (EBM). The materials were analysed using XPS, XRD, SEM and STEM/EDS techniques. Mass gains in both alloys were comparable and relatively small for air oxidation, but for steam treatment the mass increase in the EBM alloy was up to 50% more than in the CD material. Mass gain showed a faster growth of the scale in the steam treated material. The oxidized materials developed thin nano-crystalline scales predominantly of aluminium and titanium oxides arranged in TiO2+Al2O3/TiO2/Al2O3 sublayers. Whiskers were detected sticking above the scale surfaces, with density much higher in steam treated specimens.

Details

OriginalspracheEnglisch
Aufsatznummer107553
FachzeitschriftIntermetallics
Jahrgang2022
Ausgabenummer145
PublikationsstatusVeröffentlicht - 2022
Peer-Review-StatusJa
Extern publiziertJa

Externe IDs

Scopus 85127485026

Schlagworte

Forschungsprofillinien der TU Dresden

Schlagwörter

  • Intermetallics, analysis, casting, chemical, diffraction/scattering (electron, neutron, X-ray), electron microscopy, oxidation, phase stability, powder metallurgy