Kinetics of α’-phase nucleation during thermal aging of Fe–22% Cr alloy


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The initial stage of phase separation of binary Fe–22 at % Cr alloy during thermal aging at 500°C is studied at the atomic-scale level by atom probe tomography. Upon the behavior analysis of pair-correlation function of chromium atoms, long-range correlations typical of spinodal decomposition are observed at short aging times, which disappear 25 h after aging. The analysis of 3D atomic maps shows that Cr-rich regions form at the initial steps of decomposition, where the chromium concentration increases with an increase in the aging time. At the aging time of ~100 h, the chromium concentration in the center of these regions reaches 80 at %, which corresponds to the α' phase.

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S. Rogozhkin

National Research Nuclear University Moscow Engineering Physics Institute; Institute for Theoretical and Experimental Physics

编辑信件的主要联系方式.
Email: SVRogozhkin@mephi.ru
俄罗斯联邦, Kashirskoe sh. 31, Moscow, 115409; ul. B. Cheremushkinskaya 25, Moscow, 117218

O. Korchuganova

National Research Nuclear University Moscow Engineering Physics Institute; Institute for Theoretical and Experimental Physics

Email: SVRogozhkin@mephi.ru
俄罗斯联邦, Kashirskoe sh. 31, Moscow, 115409; ul. B. Cheremushkinskaya 25, Moscow, 117218

A. Aleev

National Research Nuclear University Moscow Engineering Physics Institute; Institute for Theoretical and Experimental Physics

Email: SVRogozhkin@mephi.ru
俄罗斯联邦, Kashirskoe sh. 31, Moscow, 115409; ul. B. Cheremushkinskaya 25, Moscow, 117218

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