Effects of zinc on creep behavior and deformation substructures of Mg-Y alloy

M. Suzuki, T. Kimura, J. Koike, K. Maruyama

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

Compressive creep behavior of a hot-rolled Mg-Y binary alloy and Mg-Y-Zn ternary alloys containing small addition of zinc (0.02 - 0.04 mol%) has been investigated at 550 K to 650 K. Creep strength is substantially improved by small addition of zinc to Mg-Y binary alloys. The minimum creep rate of Mg-0.9Y-0.02Zn decreases to 1/10 of Mg-l.lY binary alloy. Many "planar defects" on (0001) matrix planes were observed within grains in Mg-Y-Zn ternary alloy, while typical solid solution microstructure was observed in Mg-Y binary alloy. The formation of planar defects suppresses the non-basal slip of the a-dislocations because they act as obstacles to the non-basal slip of the a-dislocations.

Original languageEnglish
Pages (from-to)473-478
Number of pages6
JournalMaterials Science Forum
Volume419-422
Issue numberI
DOIs
Publication statusPublished - 2003
EventProceedings of the Second Osaka International Conference on Platform Science and Technology for Advanced Magnesium Alloys 2003 - Osaka, Japan
Duration: 2003 Jan 262003 Jan 30

Keywords

  • Creep
  • Dislocation substructures
  • Magnesium-yttrium-zinc alloys
  • Planar defects

ASJC Scopus subject areas

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

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