Design and Characterization of Hierarchically-Strengthened, Cast Al-Ce-Ni-Mn-Sc-Zr Alloys for High-Temperature Applications

Clement N. Ekaputra*, Jovid U. Rakhmonov, Ekin Senvardarli, David Weiss, Jon Erik Mogonye, David C. Dunand

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We characterize the microstructureMicrostructure and mechanical propertiesMechanical properties of cast Al-Ce-Ni-Mn-Sc-Zr alloysAlloys designed for structural use above 300 °C. We first report on the effect of Ni on the as-cast phase formationPhase formation, where all alloysAlloys consist of fine Al11Ce3 and Ni-rich eutectic phases, but the identity of the Ni-rich phase varies with Ni content. Furthermore, these alloysAlloys contain four coarsening-resistant strengthening phases as determined from SEM and APT investigations: (i) Al11Ce3 and (ii) Ni-rich micron-scale platelets formed during eutectic solidificationSolidification, (iii) L12-Al3(Sc,Zr) nanoprecipitates formed during secondary agingAging, and (iv) Mn solute in the α-Al matrix. The Al-Ce-Ni-Mn-Sc-Zr alloyAlloys possesses higher microhardnessMicrohardness and creep resistance than compositionally simpler alloysAlloys containing fewer of the strengthening phases, indicating that these strengthening mechanisms synergize to provide increased ambient- and elevated-temperature strength.

Original languageEnglish (US)
Title of host publicationLight Metals 2024
EditorsSamuel Wagstaff
PublisherSpringer Science and Business Media Deutschland GmbH
Pages255-262
Number of pages8
ISBN (Print)9783031503078
DOIs
StatePublished - 2024
Externally publishedYes
EventLight Metals Symposium held at the TMS Annual Meeting and Exhibition, 2024 - Orlando, United States
Duration: Mar 3 2024Mar 7 2024

Publication series

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

Conference

ConferenceLight Metals Symposium held at the TMS Annual Meeting and Exhibition, 2024
Country/TerritoryUnited States
CityOrlando
Period3/3/243/7/24

Keywords

  • Aluminum alloys
  • Hierarchical strengthening
  • High-temperature
  • Mechanical properties
  • Microstructure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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