Mo¨ssbauer study of the composition fluctuation during spinodal decomposition in a 3.5 GPa Fe-10%Ni-14%Mo-19%Co (wt.%) maraging steel

The composition fluctuation during spinodal decomposition in a 3.5 GPa Fe-10%Ni-14%Mo-19%Co (wt.%) maraging steel was studied by Mo¨ssbauer spectroscopy. The aging reactions start with the redistribution of atoms, which results in the formation of Fe-Co-rich zones and Ni-Mo-Ti-rich zones at the early stages of aging. The redistribution of atoms is fast at the initial stages of aging and then becomes slow. Intermetallic compounds precipitate on the Ni-Mo-Ti-rich zones.