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<p>The phase composition of quenched binary zirconium alloys with <i>d</i>-metals of periods 4–6 of the Periodic Table is studied in detail. X-ray diffraction analysis, transmission electron microscopy, and microhardness measurements are used to characterize the alloys. We identified the systems where the orthorhombic <i>α</i>″ phase forms. A size factor <i>ε</i> = {(<i>r</i><sub>Zr</sub>&#xa0;−&#xa0;<i>r</i><sub>Me</sub>)/<i>r</i><sub>Zr</sub>}&#xa0;×&#xa0;100&#xa0;pct is shown to determine the presence of the <i>α</i>″ phase in the alloy and it is established that for the <i>α</i>″ phase to exist, <i>ε</i> should be less than ~ 15&#xa0;pct. The range of its existence depends on the rate of change of the <i>β</i> phase lattice parameter with increasing <i>d-</i>metal content in the alloy. The conditions for the <i>α</i>″ phase formation in zirconium alloys are compared with those for titanium alloys.</p>

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Regularities of Orthorhombic α″ Phase Formation in Binary Zirconium Alloys

  • 期刊论文

  • 发表日期：

    2025年7月8日

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  • A. V. Dobromyslov,
  • N. I. Taluts

摘要

The phase composition of quenched binary zirconium alloys with d-metals of periods 4–6 of the Periodic Table is studied in detail. X-ray diffraction analysis, transmission electron microscopy, and microhardness measurements are used to characterize the alloys. We identified the systems where the orthorhombic α″ phase forms. A size factor ε = {(rZr − rMe)/rZr} × 100 pct is shown to determine the presence of the α″ phase in the alloy and it is established that for the α″ phase to exist, ε should be less than ~ 15 pct. The range of its existence depends on the rate of change of the β phase lattice parameter with increasing d-metal content in the alloy. The conditions for the α″ phase formation in zirconium alloys are compared with those for titanium alloys.