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<p>The purpose of this research is to examine the impact of milling parameters on the structural and phase evolution of a non-equiatomic Al<sub>10</sub>Co<sub>25</sub>Cr<sub>8</sub>Fe<sub>15</sub>Ni<sub>36</sub>Ti<sub>6</sub> high-entropy alloy dispersed with varying Y<sub>2</sub>O<sub>3</sub> (Y<sub>2</sub>O<sub>3</sub> wt% = 0, 1, 2, and 3) concentration. Variations in crystallite size, lattice strain, and dislocation density were found in an orderly manner with the effect of milling time. X-ray diffraction (XRD) phase analysis indicates that after approximately 30&#xa0;h of milling, both “BCC” and “FCC” phases become stable, alongside a minor presence of the Al<sub>19</sub>Ni<sub>5</sub>Y<sub>3</sub> intermetallic phase. High-resolution transmission electron microscopy (HRTEM) of 30&#xa0;h milled powder also confirmed the formation of a dual-phase morphology with a minor intermetallic phase. SEM–EDS analysis and HRTEM confirm the even distribution of constituent elements within the alloy aggregate in its as-fabricated state. After 30&#xa0;h of milling, the lattice parameter, crystallite size, dislocation density, and lattice strain were determined to be 2.055&#xa0;Å, 5.135&#xa0;nm, 0.055 × 10<sup>15</sup>/m<sup>2</sup>, and 0.015%, respectively.</p>

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Synthesis of Nanocrystalline Al10Co25Cr8Fe15Ni36Ti6 Alloys Dispersed with Y2O3 by Mechanical Alloying Method

  • 期刊论文

  • 发表日期：

    2025年3月29日

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  • Tukesh Ram Sahu,
  • Vinay Kumar Soni,
  • Subhas Ganguly,
  • Sudip K. Sinha

摘要

The purpose of this research is to examine the impact of milling parameters on the structural and phase evolution of a non-equiatomic Al10Co25Cr8Fe15Ni36Ti6 high-entropy alloy dispersed with varying Y2O3 (Y2O3 wt% = 0, 1, 2, and 3) concentration. Variations in crystallite size, lattice strain, and dislocation density were found in an orderly manner with the effect of milling time. X-ray diffraction (XRD) phase analysis indicates that after approximately 30 h of milling, both “BCC” and “FCC” phases become stable, alongside a minor presence of the Al19Ni5Y3 intermetallic phase. High-resolution transmission electron microscopy (HRTEM) of 30 h milled powder also confirmed the formation of a dual-phase morphology with a minor intermetallic phase. SEM–EDS analysis and HRTEM confirm the even distribution of constituent elements within the alloy aggregate in its as-fabricated state. After 30 h of milling, the lattice parameter, crystallite size, dislocation density, and lattice strain were determined to be 2.055 Å, 5.135 nm, 0.055 × 1015/m2, and 0.015%, respectively.