Short-range ordering of heavy-element columns in nickel-based superalloys |
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| Authors: | Yushi Luo Lihui Zhang Yumei Wang Wei Guo Jie Zhan |
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| Affiliation: | 1. National Key Laboratory of Science and Technology on Advanced High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing, People’s Republic of China;2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, People’s Republic of China;3. School of Physics, Beijing Institute of Technology, Beijing, People’s Republic of China;4. National Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, People’s Republic of China |
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| Abstract: | In order to obtain comprehensive performance, heavy elements were added into superalloys for solid-solution hardening. It is found that, rather than adopting random distributions, the heavy atoms prefer to form short-range ordered columns with heavy-element stripes 1–2 nm in length. This is supported by our ab initio calculations. Owing to the strong bonding strength between the refractory elements and nickel atoms, this short-range ordering may be beneficial to the mechanical performances of superalloys. |
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| Keywords: | Superalloy short-range ordering HAADF heavy element |
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