The paper presents investigations of thermal properties of Fe–Ni and Fe–Ni–Co casting alloys affected by the heterogeneous distribution of their chemical elements. It is shown that nickel dendritic segregation has a negative effect on properties of studied invars. A mathematical model is proposed to explore the influence of nickel dendritic segregation on the thermal coefficient of linear expansion (TCLE) of the alloy. A computer simulation of TCLE of Fe–Ni–Co superinvars is performed with regard to a heterogeneous distribution of their chemical elements over the whole volume. The ProLigSol computer software application is developed for processing the data array and results of computer simulation.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 1, pp. 9–14, January, 2018.
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Ogorodnikova, O.M., Maksimova, E.V. Thermal Coefficient of Linear Expansion Modified by Dendritic Segregation in Nickel-Iron Alloys. Russ Phys J 61, 7–13 (2018). https://doi.org/10.1007/s11182-018-1358-x
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DOI: https://doi.org/10.1007/s11182-018-1358-x