Construction of Ti-Al-Cr phase diagram using quantitative X-ray microanalysis in analytical electron microscope

T. Fujita, H. Ikeda, S. Tanaka, Z. Horita

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Abstract

This paper describes determination of the Ti-Al-Cr ternary phase diagrams using quantitative X-ray microanalysis in analytical electron microscopy. Alloys with several different compositions were subjected to heat treatments for equilibration at 1273 and 1473 K. Microstructural observations and selected area electron diffraction analyses were conducted for phase identification and characteristic X-rays were measured from each phase. The characteristic X-ray intensities were then converted to concentrations using the ζ-factor method while the absorption correction was simultaneously achieved with this method. It was found that the three-phase regions such as α2 + B2 + γ, B2 + γ + Laves and γ + Laves + L12 were present at 1273 K, whereas at 1473 K, no Laves phase was observed and disordering occurred from the α2 and B2 phases to the α and β phases, respectively. Thus, the three-phase regions were present as α + β + γ and β + γ + L12 at 1473 K. The α + β + γ and β + γ regions were extended to a lower Al concentration as the temperature decreases.

Original languageEnglish
Pages (from-to)382-388
Number of pages7
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume65
Issue number5
DOIs
Publication statusPublished - Jan 1 2001

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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