Mechanical spectroscopy of phase transitions in Fe–(23–38)Ga-RE alloys

• Published in: Journal of alloys and compounds 2021-09, Vol.874, p.159882, Article 159882
• Main Authors: Golovin, I.S., Mohamed, A.K., Palacheva, V.V., Zanaeva, E.N., Cifre, J., Samoylova, N.Yu, Balagurov, A.M.
• Format: Article
• Language: English
• Subjects: Anelasticity; Binary alloys; Cooling; Erbium; Fe–Ga; Functional alloys; Gallium; Heating; Internal friction; Magnetic measurement; Neutron diffraction; Neutrons; Phase transition; Phase transitions; Rare earth alloys; Rare-earth elements; Temperature dependence; Ternary alloys; Ytterbium
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2021.159882

Anelastic effects in Fe-(23–38)Ga binary and ternary alloys doped with rare-earth (RE) elements, RE = Pr, Sm, Tb, Er, and Yb, are studied in a sub-resonance frequency through heating and cooling in the range from 0 to 600 °C. In situ neutron diffraction, vibrating sample magnetometry (VSM), and differential scanning calorimetry (DSC) are used to trace phase transitions during heating and cooling and to interpret anelastic effects due to phase transitions. Besides the thermally activated effects, two transient effects due to the first-order transitions D03 → L12 and B2/D03 → Fe13Ga9 (later in alloys with Ga content>29 at%) are studied. In most cases, the RE elements decrease the rate of phase transitions. The obtained results demonstrate an excellent correlation between temperature-dependent internal friction, in situ neutron diffraction, and vibrating sample magnetometry tests. •Anelastic transient effects in Fe-(23−38)Ga binary and ternary alloys due to first order phase transitions are studied.•In situ neutron diffraction, magnetometry, and calorimetry confirm the origin of transient anelastic effects.•Phase transitions at heating for Fe-Ga alloys with Ga content higher than 30%.