Structural, Microstructural, and Magnetic Property Dependence of Nanostructured Ti50Ni43Cu7 Powder Prepared by High-Energy Mechanical Alloying

Rezgoun, Sarra; Sakher, E.; Chouf, S.; Bououdina, M.; Benchiheub, M.; Bellucci, Stefano

doi:10.1007/s10948-020-05455-9

Cited by 5 publications

(1 citation statement)

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“…For these reasons, the NiTiCu alloy was principally studied for shape memory recovery and applied in actuators [ 3 , 17 , 18 ]. In recent scientific literature, interest was devoted to nano-structuration by ball milling and to preparation by sintering processes from powders [ 19 , 20 , 21 , 22 ]. Moreover, several studies involve theoretical calculations and simulations to correlate the macroscopic and functional properties of NiTi alloys to microstructural characteristics and to explore the martensitic path and evolution [ 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Thermo-Mechanical Characterization of Cast NiTiCu20 Shape Memory Alloy

et al. 2021

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Among NiTi-based alloys, one of the most promising and exploited alloys is NiTiCu, since the addition of Cu in substitution of Ni in the binary equiatomic NiTi has a significant influence on the martensitic transformation and the thermomechanical properties of the system. A high content of Cu improves the damping properties at the expense of phase homogeneity and workability. The present study focuses on an alloy with a high copper content, i.e., 20 at.%. For this specific composition, the correlation between the thermal treatments, microstructure, formation of secondary phases, and damping properties are investigated by several analyses. The microscopic observation, together with the compositional analysis, allowed the determination of four different phases in the alloy. Both the calorimetry and dynamic thermo mechanical measurements, which confirmed the high damping ability of the alloy, provided a characterization of the martensitic transition. Finally, the electron backscatter diffraction (EBSD) analysis detected the different crystallographic structures (i.e., cubic austenite, orthorhombic martensite, and cubic (face-centered) NiTi2) and their orientation in the different phases. Therefore, the present work aims to improve the knowledge of the role of secondary phases in the optimization of the NiTiCu20 alloy as a valuable alternative to typical alloys used for damping purposes.

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