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The evolution of reverted austenite in 18Ni(350) maraging steel was examined using transmission electron microscopy. The types of reverted austenite observed were determined by the aging temperature and time. On aging at 500 and 570°C, lath-like austenite appears at the prior grain boundaries and the martensite lath-boundaries, but after aging for 4 h at 570°C, plate-like austenite was observed within...
The aging behavior of 18Ni(350) maraging steel was studied by Mossbauer 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 is slow. The shape of the concentration fluctuation during the early stages...
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