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Atomic structures of precipitates in Al–Mg–Si alloys with small additions of other elements

Saito, Takeshi; Mørtsell, Eva Anne; Wenner, Sigurd; Marioara, Calin Daniel; Andersen, Sigmund Jarle; Friis, Jesper; Matsuda, Kenji; Holmestad, Randi
Journal article, Peer reviewed
Accepted version
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URI
http://hdl.handle.net/11250/2626786
Date
2018
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  • Institutt for fysikk [2567]
  • Institutt for materialteknologi [2408]
  • Publikasjoner fra CRIStin - NTNU [35008]
Original version
Advanced Engineering Materials. 2018, 20:1800125 (7), .   10.1002/adem.201800125
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.
Publisher
Wiley
Journal
Advanced Engineering Materials

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