The Comparative Study of Phase Composition of Steels Using X-Ray Diffraction and Mossbauer Spectroscopy Methods

摘要

In this paper phase composition of several steels was investigated by X-ray diffraction and conversion electron Moessbauer spectroscopy (CEMS) methods. Different heat treatments were performed on steel samples in order to obtain various phase compositions (containing bainitic ferrite, martensite and retained austenite). The diffraction patterns were analyzed using the Rietveld method. Moessbauer spectra were fitted and studied for existent phases. A comparison between results obtained by each method was performed. Both methods revealed some supersaturation of carbon in the retained austenite and in the bainitic ferrite phases, various after different treatments. The quantitative phase composition measured by X-ray diffraction results differ significantly from the Moessbauer spectroscopy results. The possible reasons of the observed differences were discussed.