Effect of rare-earth elements Y and Dy on the deformation behavior of Mg alloy single crystals

Seiji Miura, Shigeki Imagawa, Takeshi Toyoda, Kenji Ohkubo, Tetsuo Mohri

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Effect of rare-earth elements (Y and Dy) on the mechanical properties of Mg solid solution single crystal is investigated. Comparing with the effect of other elements reported by previous studies, the solid solution strengthening by Y and Dy are much higher than that of other additives such as Zn for basal slip operation, while the isotropic strain by Zn atoms is higher than those of Y and Dy, Strain-rate changing tests were conducted for a further understanding of the dislocation motion and it revealed that the activation volumes estimated for Mg alloys with Y and Dy are much smaller than that of Zn-added alloy, while the activation enthalpy is almost the same. It was confirmed that the high strengthening effect by Dy addition is also found by Y addition, while the elastic interaction based on neither isotropic or anisotropic distortion are sufficient to explain the origin of the strengthening effect by Y and Dy addition.

Original languageEnglish
Pages (from-to)952-956
Number of pages5
JournalMaterials Transactions
Volume49
Issue number5
DOIs
Publication statusPublished - 2008 May 1

Keywords

  • Activation enthalphy
  • Activation volume
  • Lattice constant
  • Solid solution hardening

ASJC Scopus subject areas

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

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