Al-Mg-X(X=Si, Ge)合金における溶質原子および空孔間の相互作用

Kensuke Kurihara, Ivan Lobzenko, Tomohito Tsuru, Ai Serizawa

研究成果: Article査読

抄録

Al-Mg-Ge alloys are considered to exhibit similar aging behavior as Al-Mg-Si alloys, therefore, they have been alternatively used to analyze precipitates in Al-Mg-Si alloys. However, the interactions between solute atoms and vacancies in Al-Mg-Ge alloys are not clear. In this study, the binding energies between solute atoms and between solute atoms and vacancies in Al-Mg-Si and Al-Mg-Ge alloys were investigated using first-principles calculations, and the similarities and differences of biding energy in each alloy were analyzed. Comparing the three-body binding energy, the Mg-Ge-vacancy interaction in the Al matrix was stronger than the Mg-Si-vacancy interaction. The difference in the bond strength could be explained by the difference in the atomic radii against the Al atom. However, the binding energy change with different bond angles was consistent for the Si and Ge cases. These results indicate that similar interactions between solute atoms and vacancies are one of the reasons for the formation of similar precipitates in Al-Mg-Si and Al-Mg-Ge alloys. In addition, the strong interactions between solute atoms and vacancies in Al-Mg-Ge alloys suggest that the clustering occurs more rapidly than in Al-Mg-Si alloys, resulting in a rapid increase of hardness at the early stage of precipitation.

寄稿の翻訳タイトルInteraction between solute atoms and vacancies in Al-Mg-X (X=Si, Ge) alloys
本文言語Japanese
ページ(範囲)427-429
ページ数3
ジャーナルKeikinzoku/Journal of Japan Institute of Light Metals
72
7
DOI
出版ステータスPublished - 2022

Keywords

  • Al-Mg-Ge alloy
  • Al-Mg-Si alloy
  • binding energy
  • first-principles calculations
  • vacancy

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

フィンガープリント

「Al-Mg-X(X=Si, Ge)合金における溶質原子および空孔間の相互作用」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル