Comparison of the Effect of 2 at. % Additions of Nb and Ta on the 1100 °C Oxidation Behavior of Ni-6Al-(4,6,8) Cr Model Alloys

Rafael Rodriguez De Vecchis, Rishi Pillai, Kim Kisslinger, Meng Li, Judith Yang, Brian Gleeson

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

To continue improving alloy performance in harsh service environments, the development of alumina-forming nickel-based superalloysNickel-based superalloy is essential. Current generations of these alloys heavily rely on the addition of refractory elements to enhance their mechanical propertiesMechanical propertiesat high temperaturesHigh temperature oxidation; however, a systematic understanding of how such additions affect the overall oxidationOxidation behavior is still not well established, particularly from the standpoint of predicting the transition from internal to external alumina formation. The present work seeks to better understand the intrinsic effects that common minor additions of Ta and Nb have on the oxidationOxidation behavior of alumina-scale-forming γ-Ni model alloysModel alloy. By combining a novel simulation approach with high-temperatureHigh temperatureoxidationOxidation experiments and advanced characterization techniques, the present study provides insightful details on the differing effects that 2 at. % addition of Ta and Nb have on the alumina scale formation of Ni-based alloysNi-based alloy during 1100 °C oxidationOxidation.

Original languageEnglish
Title of host publicationSuperalloys 2024 - Proceedings of the 15th International Symposium on Superalloys
EditorsJonathan Cormier, Ian Edmonds, Stephane Forsik, Paraskevas Kontis, Corey O’Connell, Timothy Smith, Akane Suzuki, Sammy Tin, Jian Zhang
PublisherSpringer Science and Business Media Deutschland GmbH
Pages587-597
Number of pages11
ISBN (Print)9783031639364
DOIs
StatePublished - 2024
Event15th International Symposium on Superalloys, ISS 2024 - Pennsylvania, United States
Duration: Sep 8 2024Sep 12 2024

Publication series

NameMinerals, Metals and Materials Series
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Conference

Conference15th International Symposium on Superalloys, ISS 2024
Country/TerritoryUnited States
CityPennsylvania
Period09/8/2409/12/24

Keywords

  • High-temperature oxidation
  • Ni-based superalloys
  • Niobium
  • Tantalum

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