Scholarlink

<p>A thermodynamic database for the liquid (L), fcc (A1), and bcc (A2) phases of the Cu–Cr–Fe–Co–Ni system was developed using the CALPHAD method. The database includes model parameters for the thermodynamic mixing functions of binary and ternary boundary systems. The database was developed to model the temperature and composition ranges for high-entropy fcc alloys existing in the Cu–Cr–Fe–Co–Ni system at temperatures exceeding 1000 K. As a first application, phase diagrams for boundary quaternary systems were calculated, and it was shown that each of them was characterized by fcc fields extending in temperature and composition. In the Cu–Fe–Co–Ni system, the fcc phase undergoes binodal decomposition, and the formed two-phase region grows with decreasing temperature, occupying most of the composition tetrahedron. In the Cr–Fe–Co–Ni composition space, the fcc phase is predominant, while the bcc and fcc + bcc regions are located along the Cr–Fe edge. In quaternary systems containing copper, conditions exist for the separation of equilibrium and supercooled melts over a wide composition range. The results of the calculations indicate the potential of the examined systems for producing single-phase high-entropy alloys, precipitation-strengthened alloys, and composite materials with a frozen emulsion structure.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Temperature and Composition Ranges of FCC HEA Existence in the Cu–Cr–Fe–Co–Ni System I. Database and Results of Calculations for Boundary Quaternary Systems

  • 期刊论文

  • 发表日期：

    2026年7月23日

查看全文
  • M. A. Turchanin,
  • P. G. Agraval,
  • A. O. Vodopyanova,
  • M. V. Bulanova,
  • I. V. Fartushna

摘要

A thermodynamic database for the liquid (L), fcc (A1), and bcc (A2) phases of the Cu–Cr–Fe–Co–Ni system was developed using the CALPHAD method. The database includes model parameters for the thermodynamic mixing functions of binary and ternary boundary systems. The database was developed to model the temperature and composition ranges for high-entropy fcc alloys existing in the Cu–Cr–Fe–Co–Ni system at temperatures exceeding 1000 K. As a first application, phase diagrams for boundary quaternary systems were calculated, and it was shown that each of them was characterized by fcc fields extending in temperature and composition. In the Cu–Fe–Co–Ni system, the fcc phase undergoes binodal decomposition, and the formed two-phase region grows with decreasing temperature, occupying most of the composition tetrahedron. In the Cr–Fe–Co–Ni composition space, the fcc phase is predominant, while the bcc and fcc + bcc regions are located along the Cr–Fe edge. In quaternary systems containing copper, conditions exist for the separation of equilibrium and supercooled melts over a wide composition range. The results of the calculations indicate the potential of the examined systems for producing single-phase high-entropy alloys, precipitation-strengthened alloys, and composite materials with a frozen emulsion structure.