Solubilized maraging-400 alloys were aged at 480 °C, 580 °C, and 650 °C, for 3, 6, and 12 hours and characterized by X-ray diffraction (Rietveld refinement), Mössbauer spectroscopy, and microhardness tests. The results revealed that the aging treatments induced an atomic rearrangement in the martensite phase, involving a change in the composition and lattice parameters, reversion of austenite, and, in some samples, the formation of the μ phase. The amounts of reverted and precipitated phases were dependent on the aging time and temperature. The tetragonal distortion from cubic symmetry, usually presented by martensite in solution-annealed maraging steels, was not eliminated after aging. The results obtained for these maraging-400 alloys are compared with those obtained for maraging-350 steel samples.
Metallurgical and Materials Transactions A – Springer Journals
Published: Jun 4, 2018
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