Effects of yttrium on creep behavior and deformation substructures of magnesium

M. Suzuki, R. Inoue, M. Sugihara, H. Sato, J. Koike, K. Maruyama, H. Oikawa

Research output: Contribution to journalConference article

19 Citations (Scopus)

Abstract

Compressive creep behavior and deformation substructures of binary Mg-Y(-Zn) alloys were investigated at 550 K to approximately 650 K under 4 to approximately 200 MPa. Creep strength of magnesium is significantly improved by addition of yttrium as compared with Mg-3mol%Al solution hardening alloy. The small addition of zinc (less than 0.1 mass%) to Mg-Y binary alloys is effective to decrease creep rate by more than one order of magnitude. This effect is remarkable in solid-solution state and diminishes in precipitation-hardening alloys. TEM observations reveal that many `planer defects' with a+c-component are introduced on the basal planes in Mg-Y-Zn alloys. These defects can act as the obstacles for dislocation motion and high strain-hardening increases creep resistance of Mg-Y-Zn alloys.

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalMaterials Science Forum
Volume350
Publication statusPublished - 2000 Jan 1
EventProceedings of the 1st Nagaoka International Workshop on Magnesium Platform Science and Technology 2000 - Nagaoka, Jpn
Duration: 2000 Jul 272000 Jul 29

ASJC Scopus subject areas

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

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    Suzuki, M., Inoue, R., Sugihara, M., Sato, H., Koike, J., Maruyama, K., & Oikawa, H. (2000). Effects of yttrium on creep behavior and deformation substructures of magnesium. Materials Science Forum, 350, 151-156.