Coherent phase equilibrium in the Ni-V system

D. K. Na, J. B. Cohen*, P. W. Voorhees

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The influence of coherency strains on phase equilibrium has been examined experimentally in Ni-V alloys using in-situ high-temperature X-ray diffraction. The composition changes due to coherency strains have been sampled through shifts in the peak positions. The misfit versus temperature and the elastic constants of the α and β phases were investigated in order to compare experimental results with existing theories. Long-range order vs. temperature was also measured to examine its contribution to the misfit. The influence of coherency is small, but the basic tenets of the theories are supported: (1) the lever rule does not hold in the presence of coherency strains; (2) the composition is different for coherent and incoherent phases. The incoherent phase boundaries were also calculated from the data.

Original languageEnglish (US)
Pages (from-to)10-15
Number of pages6
JournalMaterials Science and Engineering A
Volume272
Issue number1
DOIs
StatePublished - Nov 15 1999

Keywords

  • Coherency
  • Phase-rule
  • Precipitation

ASJC Scopus subject areas

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

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