首页|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

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

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  • NSTL
  • Elsevier
Oxidation resistance of gamma - TiAl alloy RNT650 exposed to air and steam at 650 degrees 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.

IntermetallicsOxidationPhase stabilityCastingPowder metallurgyAnalysisChemicalDiffractionscattering (electronNeutron andX-ray)Electron microscopyTIAL-BASED ALLOYSNI-BASED ALLOYSOXIDATION BEHAVIORMECHANICAL-PROPERTIESADVANCED STEELSMICROSTRUCTUREIMPROVEMENTRESISTANCESURFACENB

Dudziak, T.、Rzad, E.、Morgiel, J.、Wytrwal-Sarna, M.、Kirchner, A.、Pomorska, M.、Boron, L.、Polczyk, T.、Moskal, G.、Tobola, D.、Kloeden, B.、Weissrgaerber, T.

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Krakow Inst Technol

Polish Acad Sci

AGH Univ Sci & Technol

Fraunhofer

Silesian Tech Univ

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2022

10.1016/j.intermet.2022.107553

Intermetallics

Intermetallics

EISCI
ISSN：0966-9795
年,卷(期)：2022.145
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