Mössbauer spectroscopy analysis on a tempered martensitic 9 % Cr steel

R. BIANCHI; A. SZTRAJMAN; C. A. DANÓN; C. SARAGOVI; C. P. RAMOS

La Plata

Conferencia; LACAME08 - XI Latin American Conference on the Applications of the Mössbauer Effect; 2008

We report an analysis by means of Mössbauer spectroscopy, on a 9 % Cr steel submitted to a tempering process at 780 °C. Spectra of several samples with different tempering times obtained at room temperature are fitted, and a study on existent phases is made. From the former analysis, we infere the existence of different neighbors of the Fe atom governed by the concentration of alloying elements. In particular, we analyze the behavior of Cr, as the main substitutional atom. An additional measurement of samples at low velocities is made, aiming to reveal the existence of precipitated carbides. Finally a comparison between samples is performed, in order to obtain a detailed study of the effect of tempering time on hyperfine parameters.