Metallurgical and Materials Transactions A

, Volume 49, Issue 11, pp 5871–5877 | Cite as

Effect of Copper Addition on the Cluster Formation Behavior of Al-Mg-Si, Al-Zn-Mg, and Al-Mg-Ge in the Natural Aging

  • Daichi Hatakeyama
  • Katsuhiko NishimuraEmail author
  • Kenji Matsuda
  • Takahiro Namiki
  • Seungwon Lee
  • Norio Nunomura
  • Tetsuo Aida
  • Teiichiro Matsuzaki
  • Randi Holmestad
  • Sigurd Wenner
  • Calin D. Marioara


The time-dependent resistivity of Al-Mg-Si(-Cu), Al-Zn-Mg(-Cu), and Al-Mg-Ge(-Cu) alloys are studied over a range of constant temperatures between 255 K and 320 K. The resistivity vs time curves for the samples show three temperature stages associated with solute element–vacancy clustering. Cu addition was found to make the stage transition time longer for the studied samples. Arrhenius plots of the transition time vs temperature provide the activation energy (Q) of clustering from stage I to II and II to III. While the Cu addition increased the Q(I to II) values of Al-1.0 pct Mg2Si-0.20 pct Cu and Al-2.68 pct Zn-3.20 pct Mg-0.20 pct Cu, it was found that the added Cu decreased the Q(I to II) value of Al-0.44 pct Mg-0.19Ge-0.18 pct Cu. The Q(II to III) values of Al-1.0 pct Mg2Si and Al-2.68 pct Zn-3.20 pct Mg were slightly decreased by the Cu addition. The different effect of added Cu on the Q values is discussed in terms of diffusivity and binding energy between vacancies and solute elements.



This study has been supported by the funds from Center for Advanced Materials Research and International Collaboration, University of Toyama, The Norwegian-Japanese Aluminium Alloy Research and Education Collaboration (INTPART), Project Number 249698, and The Japan Institute of Light Metals.

Supplementary material

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Supplementary material 1 (DOCX 12 kb)
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Supplementary material 2 (TIFF 545 kb)


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2018

Authors and Affiliations

  • Daichi Hatakeyama
    • 1
  • Katsuhiko Nishimura
    • 1
    Email author
  • Kenji Matsuda
    • 1
  • Takahiro Namiki
    • 1
  • Seungwon Lee
    • 1
  • Norio Nunomura
    • 1
  • Tetsuo Aida
    • 1
  • Teiichiro Matsuzaki
    • 2
  • Randi Holmestad
    • 3
  • Sigurd Wenner
    • 4
  • Calin D. Marioara
    • 4
  1. 1.Graduate School of Science and EngineeringUniversity of ToyamaGofukuJapan
  2. 2.RIKEN Nishina Center for Accelerator Based Science, RIKENWakoJapan
  3. 3.Department of PhysicsNTNUTrondheimNorway
  4. 4.Materials and Chemistry SINTEFTrondheimNorway

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