Short-range ordering of heavy-element columns in nickel-based superalloys
Short-range ordering of heavy-element columns in nickel-based superalloys
复制标题
镍基高温合金中重元素柱的短程有序化
DOI：
10.1080/09500839.2016.1244358
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发表时间：
2016
影响因子：
1.2
通讯作者：
Zhu Jing
中科院分区：
文献类型：
--
作者：
Luo Yushi;Zhang Lihui;Wang Yumei;Ge Binghui;Guo Wei;Zhan Jie;zhang Jianxin;Zhu Jing
摘要为了获得综合性能，在高温合金中加入重元素进行固溶强化。结果表明，重原子的分布不是随机的，而是倾向于形成短程有序柱，其重元素条纹长度为1- 2nm。这是支持我们的从头计算。由于难熔元素与镍原子之间的强结合强度，这种短程有序可能有利于高温合金的力学性能。
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.