Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7999070 | Journal of Alloys and Compounds | 2015 | 5 Pages |
Abstract
The Fe-Fe3C binary phase diagram under high magnetic fields up to 21 T was investigated by a differential thermal analysis. Applying a magnetic field of 18 T, the α-γ transformation temperature Tα-γ for pure iron increased quadratically from 1181 K (a zero field) to 1206 K. With increasing magnetic field strength, the transformation temperature Ac1 (α-Fe + cementite â α-Fe + γ-Fe) increased linearly from â¼1000 K to â¼1030 K at the rate of 1.4-1.5 K Tâ1. The transformation temperature Ac3 (α-Fe + γ-Fe â γ-Fe) for Fe-0.18 wt.%C and Fe-0.38 wt.%C increased quadratically by 27 K under a 18-T field. The Ac1 and Ac3 lines shifted to higher temperatures by the magnetic field, resulting in a change in the Fe-Fe3C phase diagram. The results obtained suggest that the transformation temperatures mainly arose because of the Zeeman energy of α-Fe under high magnetic fields.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yoshifuru Mitsui, Yuki Ikehara, Kohki Takahashi, Shojiro Kimura, Goro Miyamoto, Tadashi Furuhara, Kazuo Watanabe, Keiichi Koyama,