Atomic Structures of Precipitates in Al–Mg–Si Alloys with Small Additions of Other Elements

Takeshi Saito*, Eva A. Mørtsell, Sigurd Wenner, Calin D. Marioara, Sigmund J. Andersen, Jesper Friis, Kenji Matsuda, Randi Holmestad

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

98 Scopus citations

Abstract

In Al–Mg–Si alloys, additions of only a few weight percent of Mg and Si enable formation of hardening precipitates during heat treatment. The precipitation is complex and is influenced by chemical compositions and thermo-mechanical treatment. Structural analysis at the atomic scale has played an important role for understanding the Al–Mg–Si system. This review paper gives a summary of the influence of elements on the precipitate structures of Al–Mg–Si alloys at the atomic scale. The structures are modified by small additions of different elements, but all the encountered precipitates are structurally connected with the Si network, except for the main hardening phase which exhibit a partially discontinuous Si network. The influence of the selected elements (Li, Cu, Zn, Ge, Ag, Ni, Co, and Au) is discussed in detail.

Original languageEnglish
Article number1800125
JournalAdvanced Engineering Materials
Volume20
Issue number7
DOIs
StatePublished - 2018/07

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics

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