当前位置: X-MOL 学术Phys. Rev. Materials › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Direct observation of local chemical ordering in a few nanometer range in CoCrNi medium-entropy alloy by atom probe tomography and its impact on mechanical properties
Physical Review Materials ( IF 3.1 ) Pub Date : 2021-08-26 , DOI: 10.1103/physrevmaterials.5.085007
Koji Inoue 1 , Shuhei Yoshida 2 , Nobuhiro Tsuji 2
Affiliation  

Local chemical ordering in CoCrNi medium-entropy alloy (MEA) was directly observed by the use of atom probe tomography. It was found that the densities of Cr, Co, and Ni were almost the same along the [111] direction, while those along the [001] direction were modulated to take a slightly enhanced and depleted value alternately within approximately 10 atomic layers corresponding to about 2 nm. The degree of modulation of Co and Ni was stronger than that of Cr. It was suggested that Cr-rich {001} atomic layers and (Ni + Co)-rich {001} layers tended to align mutually in the face-centered-cubic CoCrNi solid solution alloy. The mechanical properties of the MEA was found not to be affected by the presence of the local chemical ordering.

中文翻译:

原子探针断层扫描直接观察 CoCrNi 中熵合金几纳米范围内的局部化学有序性及其对力学性能的影响

通过使用原子探针断层扫描直接观察 CoCrNi 中熵合金 (MEA) 中的局部化学排序。发现沿[111]方向的Cr、Co和Ni的密度几乎相同,而沿[001]方向的密度被调制为在大约10个原子层内交替出现略微增强和耗尽的值,对应于约 2 纳米。Co和Ni的调制度强于Cr。这表明,在面心立方 CoCrNi 固溶体合金中,富含 Cr 的 {001} 原子层和富含 (Ni + Co) 的 {001} 层倾向于相互对齐。发现 MEA 的机械性能不受局部化学排序的影响。
更新日期:2021-08-26
down
wechat
bug