Investigation of the diffusion of alloying elements in multicomponent alloy using the photometric analysis of the radiation brightness spectrum

Abstract

In this paper we consider the results of studying the diffusion of molubdenum and boron in the alloy G 35 (USA), in the chemical composition of which there were 12 elements, with the help of the method of photometric analysis of structural images (PHASI), developed in IMET RAS. PHASI method is based on comparison according to the differential scheme of the spectra of the brightness of the reflection of visible light from the fragments of the surface of the object under study and their images before, during and after heating. The study was performed in situ in a high temperature metallographic microscope. The digital camera allowed in a periodic mode to register the image of the investigated fragment of the sample surface. Analysis of the data obtained by the PHASI method made it possible to establish the time and radial dependencies of the partial derivatives of the concentrations of the first and second order alloying elements that appear in the diffusion equation. A complete analysis of the obtained experimental data made it possible to obtain temperature dependencies of the diffusion coefficients of chromium and boron.