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Low temperature aging of the freshly formed martensite in an Fe-Ni-C alloy

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Abstract

Aging regime, below and at room temperature, of the martensite formed in an Fe-24.67Ni-0.87C (mass pct) alloy (M s = 160 K) is studied by using a poly crystalline X-ray diffraction technique. Parameters such as tetragonal axial ratio, unit cell volume, intensity ratios of the tetragonal doublet peaks,etc. are obtained for various degrees of aging. At temperature below ∼200 K, where the carbon atoms can shift only into their neighboring sites, the variation of the parameters indicates some discrepancies with the existing models. At room temperature, a new peak appears in between the tetragonal doublet peaks. This peak and the variation of the parameters at room temperature are explained in terms of carbon cluster formation.

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Formerly Graduate Student, Tottori University.

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Hayakawa, M., Tanigami, M. & Oka, M. Low temperature aging of the freshly formed martensite in an Fe-Ni-C alloy. Metall Trans A 16, 1745–1750 (1985). https://doi.org/10.1007/BF02670362

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  • DOI: https://doi.org/10.1007/BF02670362

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