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Effect of copper on fine precipitates at the early stage of aging in Al-Mg-X (X=Si, Ge, Zn) alloys

Matsuda, Kenji; Kawai, Akihiro; Watanabe, Katsumi; Lee, Seungwon; Marioara, Calin Daniel; Wenner, Sigurd; Nishimura, Katsuhiko; Matsuzaki, Teiichiro; Nunomura, Norio; Sato, Tatsuo; Holmestad, Randi; Ikeno, Susumu
Journal article
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allTEXTandFIGURES_2.pdf (Locked)
URI
http://hdl.handle.net/11250/2489307
Date
2017
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  • Institutt for fysikk [1838]
  • Publikasjoner fra CRIStin - NTNU [21809]
Original version
Keikinzoku/Journal of Japan Institute of Light Metals. 2017, 67 (5), 186-192.   10.2464/jilm.67.186
Abstract
Age-hardenable Al–Mg–Si, Al–Mg–Ge, and Al–Zn–Mg alloys including Cu were investigated by transmission electron microscopy to understand extra diffraction spots that appear in their selected area electron diffraction patterns. These alloys containing Cu exhibit similar extra diffracted spots to each other with diffracted spots or streaks for Al matrix and major precipitates in each alloy. The extra spots were not observed in Cu-free alloys. The initial cluster, which is based on the β″-phase in the Al–Mg–Si alloy, is proposed to be MgSi(/Ge)Mg, CuMgSi(/Ge), AlCuMg, and AlZnMg, while the second clusters, which consist of three initial clusters including anti-phase boundary short-range order, are proposed for Cu-containing alloys.
Publisher
Nihon Kinzoku Gakkai
Journal
Keikinzoku/Journal of Japan Institute of Light Metals

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