Textures and mechanical properties in rare-earth free quasicrystal reinforced Mg-Zn-Zr alloys prepared by extrusion

S. Ohhashi, A. Kato, M. Demura, Ampo Sai

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Microstructure and mechanical properties of quasicrystals dispersed Mg alloys prepared by warm extrusion of the mixtures of Mg and Zn-Mg-Zr quasicrystalline (Qc) powders have been studied. Strong texture oriented along a 1 0 1̄ 0 direction observed in pure Mg was reduced in Qc-dispersed samples, as verified by pole figure method and electron back scattering diffraction. The ultimate tensile strengths at 150 °C for Qc-dispersed extrusions were much higher than 110. MPa for pure Mg, which drastically reached 156. MPa for 15. wt.% Qc by preventing the motion of dislocations. Elongation was improved by the randomization of grain orientation: from 5.7% for pure Mg to 12.9% for 10. wt.% Qc at room temperature; from 15% for pure Mg to 37.1% for 5. wt.% Qc at 150 °C.

Original languageEnglish
Pages (from-to)5871-5874
Number of pages4
JournalMaterials Science and Engineering A
Volume528
Issue number18
DOIs
Publication statusPublished - 2011 Jul 15

Keywords

  • Magnesium extrusion
  • Mechanical property
  • Quasicrystalline
  • Rare-earth free
  • Texture

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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