Towards a True Fe-Ni Phase Diagram
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ABSTRACTA modification to the existing Fe-Ni phase equilibrium diagram is proposed that takes account of the low-temperature ordering reaction to FeNi. It is shown that true equilibrium is never attained during slow cooling of Fe-Ni alloys, even for iron meteorites (which cool extremely slowly). In all real cases, a metastable phase diagram applies, in which the depressed γ/α+γ solvus produces a more extensive γ+ FeNi phase field than for the equilibrium case. This enlarged phase field is used to explain the decomposition of supersaturated Fe-Ni to γ+ FeNi, which is observed only in iron meteorites.
2008 ◽
Vol 23
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pp. 2996-3005
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2009 ◽
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pp. 18661-18666
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2001 ◽
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pp. 10326-10334
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2001 ◽
Vol 21
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pp. 2521-2533
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1978 ◽
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pp. 2449-2454
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2013 ◽
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pp. 468-472
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1986 ◽
Vol 78
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pp. 157-162
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