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arXiv · 1710.08604

Peculiar metastable structural state in carbon steel

S. A. Murikov·A. V. Shmakov·V. N. Urtsev·I. L. Yakovleva·Yu. N. Gornostyrev·M. I. Katsnelson·M. L. Krasnov
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Abstract

The kinetics of phase transformations at cooling of carbon steel in dependence on the temperature of preliminary annealing T$_{an}$ is studied. It is shown that the cooling from T$_{an}$ > A$_3$ (i. e. above the temperature of ferrite start) with the rate 90 - 100 K/s results in structural state which essentially dependent on T$_{an}$; at 750$^0$C < T$_{an}$ < 830$^0$C the transformation is of perlite type whereas at T$_{an}$ > 830$^0$C the martensitic structure arises. Our results evidence the formation of a special structural state in a certain range of temperatures near and above the boundary of two phase region which is characterized by a substantially nanoscale heterogeneity in carbon distribution, lattice distortions, and magnetic short-range order.

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S. A. Murikov, A. V. Shmakov, V. N. Urtsev, I. L. Yakovleva, Yu. N. Gornostyrev, M. I. Katsnelson, M. L. Krasnov. 2017-10-24. Peculiar metastable structural state in carbon steel. https://arxiv.org/abs/1710.08604

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