Strength and failure of ultrafine grain and bimodal Al-Mg alloy at high temperatures

Andrew Magee, Leila Ladani

Research output: Contribution to journalConference articlepeer-review

Abstract

Uniaxial tensile tests are conducted at room and high temperatures on a bimodal grain size Al-Mg alloy with an ultrafine grain matrix as the major constituent to evaluate the strength and failure mode of the material. The coarse grain ratio and anisotropy effects are also investigated as parameters that could influence the mechanical behavior. It was found that the strength of the material decreases rapidly with temperature such that at 473 K, it was somewhat weaker than a comparable conventional alloy. Dynamic recovery was observed and found to be dependent on coarse grain ratio. Strength anisotropy was found to be reduced with increasing temperature. No evidence of thermally or mechanically assisted grain growth were observed.

Original languageEnglish (US)
Pages (from-to)279-282
Number of pages4
JournalMinerals, Metals and Materials Series
Issue number210869
DOIs
StatePublished - 2016
Externally publishedYes
Event142nd Annual Meeting and Exhibition, TMS 2013 - San Antonio, United States
Duration: Mar 3 2013Mar 7 2013

Keywords

  • Al-Mg alloy
  • Bimodal micro structure
  • Mechanical testing
  • Thermal effects

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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