Creep behavior and deformation substructure of Mg-Y alloys containing dilute content of zinc

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

Research output: Contribution to journalConference articlepeer-review

16 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 was investigated at 650 K. Creep strength was significantly improved by addition of zinc to Mg-Y binary alloys. The minimum creep rate of Mg-Y-Zn ternary alloys containing 0.02 mol% zinc was ten times lower than that of the Mg-Y binary alloy. In the Mg-Y-Zn ternary alloys, many "planar defects" were observed on a (0001) plane in magnesium matrix during heat treatment, while no such a defect was observed in the Mg-Y binary alloy. These planar defects acted as obstacles to the non-basal slip of the dislocations. Furthermore, the a-dislocations were extended widely on the basal planes. The partial dislocations interacted strongly with each other, so that the dislocation mobility decreases.

Original languageEnglish
Pages (from-to)593-598
Number of pages6
JournalMaterials Science Forum
Volume426-432
Issue number1
DOIs
Publication statusPublished - 2003
EventThermec 2003 Processing and Manufacturing of Advanced Materials - Madrid, Spain
Duration: 2003 Jul 72003 Jul 11

Keywords

  • And dislocation substructures
  • Creep
  • 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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