Microstructure and mechanical properties of an al-zr-er high temperature alloy microalloyed with tungsten

A. R. Farkoosh*, David Dunand, David N. Seidman

*Corresponding author for this work

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

1 Scopus citations

Abstract

We studied the possibility of improving the coarsening resistance of nanoprecipitates with the L12 structure, in an Al-Zr-Er alloy system, by microalloying with slow-diffusing tungsten (W). Dilute Al-Zr-Er-W alloys with and without Si were prepared, cast and isochronally (3 h steps, from 200 to 600 °C) aged to understand the behavior of W and its interactions with Zr and Er in aluminum. The microstructure of these alloys in the as-cast and aged conditions has been studied over relevant length scales in parallel with electrical conductivity and microhardness measurements. In addition to optical microscopy studies, local-electrode atom-probe tomography analyses are performed to investigate the structure of the age-hardening (L12) nanoprecipitates in selected alloys.

Original languageEnglish (US)
Title of host publicationLight Metals, 2019
EditorsCorleen Chesonis
PublisherSpringer International Publishing
Pages379-383
Number of pages5
ISBN (Print)9783030058630
DOIs
StatePublished - Jan 1 2019
EventLight Metals Symposium held at the TMS Annual Meeting and Exhibition, 2019 - San Antonio, United States
Duration: Mar 10 2019Mar 14 2019

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, 2019
CountryUnited States
CitySan Antonio
Period3/10/193/14/19

Keywords

  • Atom-probe tomography
  • Coarsening resistance
  • L1 nanoprecipitates

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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