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The Creep and Oxidation Behaviour of Pesting-Resistant $(Mo,Ti)_{5}Si_{3}$-Containing Eutectic-Eutectoid Mo-Si-Ti Alloys

Obert, Susanne; Kauffmann, Alexander; Pretzler, Rupert; Schliephake, Daniel; Hinrichs, Frauke; Heilmaier, Martin

Abstract:
In this study we present a series of light-weight (6.24 to 6.42 g/$cm^3$), Ti-rich Mo-Si-Ti alloys (≥40 at.% nominal Ti content) with the hitherto best combination of pesting and creep resistance at 800 and 1200 °C, respectively. This has been achieved by fine-scaled eutectic-eutectoid microstructures with substantial fractions of primarily solidified $(Mo,Ti)_{5}Si_{3}$. $(Mo,Ti)_{5}Si_{3}$ was found to be oxidation-resistant in these alloys and also beneficial for the creep resistance. The enhanced solidus temperature is of specific relevance with respect to the latter point. The creep resistance is competitive to the non-pesting resistant, but most creep-resistant (among the Mo-Si-Ti alloys) eutectoid alloy Mo-21Si-34Ti developed by Schliephake et al. [Schliephake et al., in Intermetallics 104 (2019) pp. 133–142]. Moreover, it is favourably superior to the commercially applied Ni-based single crystal alloy CMSX-4 for the applied compressive loading conditions under vacuum.


Verlagsausgabe §
DOI: 10.5445/IR/1000128822
Veröffentlicht am 20.01.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Graduiertenkolleg 2561: Materials Compounds from Composite Materials (GRK 2561)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2075-4701
KITopen-ID: 1000128822
HGF-Programm 38.04.01 (POF IV, LK 01) Gas turbines
Erschienen in Metals
Verlag MDPI
Band 11
Heft 1
Seiten Art.-Nr.: 169
Vorab online veröffentlicht am 18.01.2021
Schlagwörter 2020-024-029393 FIB
Nachgewiesen in Dimensions
Web of Science
Scopus
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