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Thermodynamic Investigation of Propagating Behavior in SHS for Equiatomic and Non-Equiatomic NiTi Alloys Using Factsage Software

Keskin B., Derin B.

Archives of Metallurgy and Materials

2024

Vol. 69, iss. 3

1261--1269

In the current work, the thermodynamic properties of equiatomic and non-equiatomic Ni-Ti were estimated using Factsage Software for the “self-propagating high temperature synthesis (SHS) method. To calculate behind the pure substance model, the sublattice model was used. For the various ratios of the nickel in the B2 ordered phase and second intermetallics, the values of adiabatic temperature, Cp, Gibbs free energy, enthalpy of formation, products, and liquid-solid ratio were computed (Ni3Ti, Ti2Ni). These proporties play a crucial role in understanding the nature of propagating behavior since they affect the final product’s micro/macrostructure, mechanical characteristics, and stable or metastable phases. The results were compared with the literature. It was also discussed why the existing studies could not reach the theoretical adiabatic temperature and the effect of the ignition W wire on the sample was investigated with the experimental study.