Plasticity of Al-Ni-Co decagonal single quasicrystals

K. Edagawa, S. Ohta, S. Takeuchi, E. Kabutoya, J. Q. Guo, A. P. Tsai

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Compression experiments have been performed for Al-Ni-Co decagonal single quasicrystals grown by a floating zone method with different orientations of the compression axes: the tenfold direction (c), a twofold direction perpendicular to it (c) and a direction inclined from the tenfold direction by about 45° (c45°). The yield stresses obtained range from 700 to 1050 MPa at 973 K, which are much larger than those previously reported. The anisotropy in the yield stress is less than a factor of two. For the c45° compressed samples, a slip deformation has been observed on a twofold prismatic slip plane and in the tenfold slip direction. Long straight screw dislocations have been observed by transmission electron microscopy (TEM) in the c45° compressed samples, indicating the existence of deep Peierls-potential valleys for the dislocation glide. The c and c compressed samples have shown slip deformations along more than two types of pyramidal slip planes.

Original languageEnglish
Pages (from-to)748-752
Number of pages5
JournalMaterials Science and Engineering A
Volume294-296
DOIs
Publication statusPublished - 2000 Dec 15

ASJC Scopus subject areas

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

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