Diffusion-kinetic model of intermetallidic phase development and growth in three-component Ni-based solid solutions based on diffusion coefficient temperature dependence

BACKGROUND: Nickel alloys are used in various industries due to their attractive mechanical properties. Nickel alloys are also widely used in additive manufacturing to make complex-shaped products. The direct laser deposition method implies high heating and cooling rates, which can be influenced by manufacturing parameters such as laser power and manufacture speed. AIM: A diffusion-kinetic model will allow to make calculations of the size of the intermetallidic phase in various direct laser deposition modes in Ni alloys. MATERIALS AND METHODS: This article describes a model for calculating the sizes of the intermetallidic phase in a three-component Ni alloy in a chemical reaction between the alloying elements only. RESULTS: Calculation of the size of the intermetallidic phase will allow to forecast the mechanical properties of products manufactured by direct laser deposition before the actual manufacture. A next step is to validate this diffusion-kinetic model subject to the chemical reaction between the alloying elements only. CONCLUSIONS: The paper presents a model used to calculate the size of intermetallic phase made of alloying elements in a three-component nickel alloy. The model will help to predict the size of intermetallic compounds and, thus, the mechanical properties of products.