Plastic deformation of single crystals of TiSi2 with the C54 structure

H. Inui, M. Moriwaki, N. Okamoto, M. Yamaguchi

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The deformation behavior of single crystals of TiSi2 with the orthorhombic C54 structure has been investigated as a function of crystal orientation in the temperature range from room temperature to 1400 °C in compression. Plastic flow is possible only when slip along 〈 110 〉 on (001) is operative and no other slip systems are observed in the whole temperature range investigated. While plastic flow is observed above 300 °C for as-grown crystals, the onset temperature for plastic flow is lowered considerably down to room temperature when the crystal is prestrained at 1300 °C and then re-deformed at low temperatures. The critical resolved shear stress (CRSS) for (001) 〈 110 〉 slip decreases with increasing temperature, exhibiting a moderate peak (or plateau) in the temperature range from 800 to 1100 °C. The deformation mechanism of TiSi2 is discussed in comparison with those reported for other transition-metal disilicides with the C11b and C40 structures, which are closely related to the C54 structure of TiSi2.

Original languageEnglish
Pages (from-to)1409-1420
Number of pages12
JournalActa Materialia
Volume51
Issue number5
DOIs
Publication statusPublished - 2003 Mar 14
Externally publishedYes

Keywords

  • Dislocations
  • Intermetallic compounds
  • Mechanical properties
  • Single crystal
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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