Mechanism of formation of aligned two-phase microstructure in a Fe-0.25wt%C alloy under high magnetic field gradients |
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| Authors: | Kai Wang Chunjiang Wang Yi Yuan Chunming Liu Jicheng He |
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| Institution: | 1. Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University , Shenyang 110004, China;2. School of Materials and Metallurgy, Northeastern University , Shenyang 110004, China |
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| Abstract: | The effect of a magnetic force on creating an aligned two-phase microstructure in a Fe-0.25wt%C alloy under magnetic field gradients has been investigated. Through the changes in the heating temperature, both dipolar interactions and magnetic forces work together during the austenite to ferrite transformation. The results showed that the aligned two-phase microstructure is not observed under the influence of the magnetic force alone. The ferrite grains are elongated due to dipole interactions at the early stages of their nucleation and growth and then the magnetic force turns the elongated ferrite grains, whose major axis is not parallel to the direction of magnetic force, to the direction of the field in the presence of magnetic field gradients. |
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| Keywords: | magnetic field gradient phase transformations microstructure Fe–C alloys |
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