Time-Temperature Dependent Short- and Long-Range Structural Transformation in Medium-Entropy Alloys
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- Umemoto Yoshihiko
- Graduate School of Science, Tohoku University
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- Ikeda Yoichi
- Institute for Materials Research, Tohoku University
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- Fujita Masaki
- Institute for Materials Research, Tohoku University
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<p>Neutron scattering experiments were conducted to reveal the origin of diffuse scattering in a medium-entropy alloy (MnCoNi). Results showed that a time-temperature-dependent short- and long-range structural transformation from a face-centered cubic to a primitive tetragonal structure occurs. In the MnCoNi alloy, the long-range ordered phase with a relatively small c/a ratio of 3.7(1)% can only be grown in a limited temperature range, whereas short-range structural transformation with a short correlation length of 1–4 nm can be formed in a wide temperature range. On the contrary, no sign of short-/long-range staggered atomic rearrangement, such as L10 and L12 structures, was observed in the CrCoNi alloy at least at room temperature. The difference in the forming ability of short-/long-range ordering between the MnCoNi and CrCoNi alloys was discussed.</p>
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 64 (8), 2018-2021, 2023-08-01
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390578360713707392
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 032974045
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可