Experimental investigation of phase equilibria and microstructure in the Co-Ti-V ternary system

J. J. Ruan, C. P. Wang, C. C. Zhao, S. Y. Yang, T. Yang, X. J. Liu

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

The phase equilibria in the Co-Ti-V ternary system have been investigated by means of optical microscopy (OM), electron probe microanalyzer (EPMA), differential scanning calorimetry (DSC), field emission scanning electron microscope (SEM) and X-ray diffraction (XRD). The mechanical properties were measured by compressive tests. Four isothermal sections of the Co-Ti-V ternary system at 800 C, 1000 C, 1100 C and 1200 C were experimentally established. The results show that: (1) there is no ternary compound in this system; (2) the CoTi2 phase and Co3Ti phase stabilized by the V addition; (3) a large solubility of Ti in the σ-Co2V3 phase was observed at all isothermal sections of 800 C, 1000 C, 1100 C and 1200 C; (4) The alloy with the distribution of fine cuboidal Co3Ti (L1 2) in (αCo) phase was observed. (5) The compressive strength of Co77.29Ti5.83V16.88 (at.%) alloy at room temperature was measured to be about 1985 MPa. The newly determined phase equilibria in this system will provide useful information for the development of Co-based and Ti-based materials.

Original languageEnglish
Pages (from-to)121-131
Number of pages11
JournalIntermetallics
Volume49
DOIs
Publication statusPublished - 2014 Jun
Externally publishedYes

Keywords

  • A. Ternary alloy systems
  • B. Phase diagrams
  • D. Microstructure

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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