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

Koji Inoue, Shuhei Yoshida, Nobuhiro Tsuji

研究成果: Article査読

3 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号085007
ジャーナルPhysical Review Materials
5
8
DOI
出版ステータスPublished - 2021 8

ASJC Scopus subject areas

  • 材料科学(全般)
  • 物理学および天文学(その他)

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