Abstract
The metastable austenitic iron alloy with 31.3 wt % Ni (N31) has been used to show the possibility of the formation of a nickel-concentration inhomogeneity in a fine-grained austenite due to an α → γ trans-formation under the condition of a preliminary formation of a nickel-enriched intermediate nanocrystalline γ phase. The thermal expansion coefficients (TECs) in the range of −100 to +300°C have been estimated in concentrationally inhomogeneous steel N31 after various heat treatments. The conditions necessary to ensure the possibility of controlling the TEC in wide limits have been found.
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Original Russian Text © V.V. Sagaradze, V.A. Zavalishin, N.V. Kataeva, I.G. Kabanova, I.I. Kositsina, M.F. Klyukina, A.I. Valiullin, V.A. Kazantsev, 2014, published in Fizika Metallov i Metallovedenie, 2014, Vol. 115, No. 5, pp. 517–531.
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Sagaradze, V.V., Zavalishin, V.A., Kataeva, N.V. et al. Using an intermediate nanocrystalline γ phase for producing austenitic steels with a controllable thermal expansion coefficient. Phys. Metals Metallogr. 115, 486–499 (2014). https://doi.org/10.1134/S0031918X14050081
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DOI: https://doi.org/10.1134/S0031918X14050081