Effects of Mn and Mo Micro-additions on Al–Zr–Sc–Er–Si Mechanical Properties

Shipeng Shu*, Anthony De Luca, David N. Seidman, David C. Dunand

*Corresponding author for this work

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

1 Scopus citations

Abstract

Dilute Al–Zr–Sc–Er–Si alloys strengthened by coherent L12 Al3(Sc, Er, Zr) nanoprecipitates have potential applications at temperatures higher than 400 °C. In this research, the effects of micro-additions of 0.25 at.% Mn and/or 0.10 at.% Mo to a dilute Al-0.08Zr-0.014Sc-0.008Er-0.09Si (at.%) alloy were investigated using atom-probe tomography, as well as mechanical testing after different heat treatments. Molybdenum and manganese result in solid-solution strengthening. Aging at 400 °C leads to the formation of core-shell (L12 structure) nanoprecipitates, with Mn partitioning to the core, and Mo partitioning to both the core and nanoprecipitate/matrix interface. Manganese-modified L12 nanoprecipitates exhibit a higher number density, while Molybdenum-modified L12 nanoprecipitates display an improved coarsening resistance.

Original languageEnglish (US)
Title of host publicationLight Metals 2020
EditorsAlan Tomsett
PublisherSpringer
Pages312-317
Number of pages6
ISBN (Print)9783030364076
DOIs
StatePublished - 2020
EventLight Metals Symposium held at the 149th Annual Meeting and Exhibition, TMS 2020 - San Diego, United States
Duration: Feb 23 2020Feb 27 2020

Publication series

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

Conference

ConferenceLight Metals Symposium held at the 149th Annual Meeting and Exhibition, TMS 2020
CountryUnited States
CitySan Diego
Period2/23/202/27/20

Keywords

  • Aluminum alloys
  • Atom-probe tomography
  • Precipitation strengthening

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Effects of Mn and Mo Micro-additions on Al–Zr–Sc–Er–Si Mechanical Properties'. Together they form a unique fingerprint.

  • Cite this

    Shu, S., De Luca, A., Seidman, D. N., & Dunand, D. C. (2020). Effects of Mn and Mo Micro-additions on Al–Zr–Sc–Er–Si Mechanical Properties. In A. Tomsett (Ed.), Light Metals 2020 (pp. 312-317). (Minerals, Metals and Materials Series). Springer. https://doi.org/10.1007/978-3-030-36408-3_45