Deformation behavior of Mg alloy single crystals at various temperatures

Seiji Miura, Suguru Yamamoto, Kenji Ohkubo, Tetsuo Mohri

Research output: Contribution to journalConference articlepeer-review

15 Citations (Scopus)

Abstract

Temperature dependence of the deformation behavior of Mg-alloy single crystals containing 0.5 at.%Dy or Zn is investigated by compression tests at various test temperatures ranging from 77 K to 473 K. The basal slip operates and the CRSS increases with decreasing temperature at the temperature range lower than room temperature. The CRSS of Mg-Dy alloy is higher than that of Mg-Zn alloy at all the test temperatures. The activation volume and the activation energy are estimated by the strain-rate changing test. The activation volume evaluated for each alloys is almost the same, 1000-4000 b3, and the activation energy of the Mg-Dy alloy is rather higher than that of the Mg-Zn alloy. Measurement of lattice constants of Mg-Dy polycrystals reveals that both the lattice constants of a-axis and c-axis increase linearly with increasing Dy concentration, whereas c/a ratio decreases and it deviates from the ideal value of c/a (1.633) for hcp lattice.

Original languageEnglish
Pages (from-to)183-188
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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