Influence of Cu on phase formation, hardness, and magnetism in high-entropy alloys

Topal S., BİLGİN S., ÇAKIL D. D., Sünbül S. E., ÖZTÜRK S., İÇİN K.

Journal of Alloys and Compounds, cilt.1043, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1043
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.jallcom.2025.184205
  • Dergi Adı: Journal of Alloys and Compounds
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Public Affairs Index, Civil Engineering Abstracts
  • Anahtar Kelimeler: High entropy alloys, Magnetic force microscope, Magnetic properties, Microstructure, Phase structure
  • Gazi Üniversitesi Adresli: Evet

Özet

In this study, the effects of Cu addition on the phase evolution, microstructure, and elemental distribution of Al1.5Co4CuxFe2Mn1.5 (x = 0, 0.1, 0.5, and 1.0) high-entropy alloys were systematically investigated. In addition, nanoindentation, magnetic properties, atomic force microscope, and magnetic force microscope analysis were carried out. XRD analysis revealed that some HEAs have BCC, FCC, and Laves phases. SEM and EDS images show that the alloys solidify in different ways depending on the Cu content, with grain structures becoming finer and secondary phases forming. Furthermore, it was revealed that the mechanical properties of the alloys change as the Cu content increases. The maximum Cu content (Cu10) peaked at 12.15 GPa nano hardness and 423.9 GPa elastic modulus. Magnetic saturation decreased and coercivity increased as the Cu content increased. The Cu0 alloy was found to have a saturation of 143 emu/g and a coercivity of 1.5 Oe. According to MFM analyses, as the Cu content increased, the ratio of the phase with high ferromagnetic interaction strength in the alloys decreased.