Microstructure and Mechanical Properties of NiTiCuFe Multi-component Alloy

NiTiCuFe multi-component alloy was synthesized using vacuum induction melting under argon atmosphere. As-cast structure shows a mixture of phases with FCC as the major phase. Microstructure of the alloy exhibits coarser non-equi-axed dendritic grains with spike-shaped inter-dendritic phases. Scanning electron image with an energy-dispersive X-ray spectrograph line scan taken across dendrites shows Cu segregation in the inter-dendritic region and other elements in the dendritic region. The result shows the presence of Fe2Ti Laves phase. Also the major phase is observed to be a Cu–Ni FCC phase. XRD analysis also confirms the presence of Fe2Ti Laves phase and Cu–Ni FCC phase. The presence of phases is confirmed using a transmission electron microscope (FEI Tecnai T20) operating at 200 kV. The alloy also exhibits good mechanical properties.