Development of Light-Weight Materials having Higher Performance at high Temperature Controlled by hexagonal-platelet Equilibrium Phase

  • 松田, 健二 (Principal Investigator)

Project Details

Abstract

For the purpose to improve mechanical property at higher temperature in Al-Mg-Si alloys, precipitates and aging behavior of20alloys with Cu and/or Ag addition have been investigated by TEM and hardness test. The hexagonal platelet has been discovered in alloys with Cu and/or Ag addition aged at673K. This is the first report about such plate. This platelet has the crystallographic orientation relationship with the Al-matrix as follows: {111}_<Al>//{l11}_<hexβ>,<110>_<Al>//<110>_<hexβ>. This platelet has the same crystal lattice and chemical composition as the normal β-Mg_2Si. However, Ag could be included in this phase by EDS analysis. These alloys with Cu and Ag aged at423K have shown higher elongation and strength than that with just Cu or Ag. This result has been proposed to the Japanese Patent.
StatusFinished
Effective start/end date2006/01/01 → 2007/12/31

Funding

  • Japan Society for the Promotion of Science: ¥1,220,000.00

Keywords

  • Al-Mg-Si合金
  • Cu添加
  • Ag添加
  • β-Mg2Si相
  • β'中間相
  • 正六角形状
  • AI-Mg-Si合金
  • β一Mg2Si相
  • Al-Mg-Si Alloy
  • Cu-addition
  • Ag-addition
  • β-Mg_2Si
  • β'-Metastable phase
  • Hexagonal platelet

Access Project

  • 2 Conference contribution
  • 1 Article

  • Crystal structure of the β'-phase in Al-Mg-Si-Ag alloy

    Matsuda, K., Nakamura, J., Nakamura, Y., Sato, T. & Ikeno, S., 2007, Supplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006. PART 1 ed. Trans Tech Publications Ltd, p. 837-841 5 p. (Materials Science Forum; vol. 539-543, no. PART 1).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

    4 Scopus citations

  • Cu segregation around metastable phase in Al-Mg-Si alloy with Cu

    Matsuda, K., Teguri, D., Sato, T., Uetani, Y. & Ikeno, S., 2007/05, In: Materials Transactions. 48, 5, p. 967-974 8 p.

    Research output: Contribution to journal › Article › peer-review

    Open Access
    19 Scopus citations

  • HRTEM observation of rod-shape precipitates in Al-Mg-Si-Ag alloy aged at 523 K

    Nakamura, J., Matsuda, K., Nakamura, Y., Sato, T. & Ikeno, S., 2007, Selected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6. PART 1 ed. Trans Tech Publications Ltd, p. 243-246 4 p. (Materials Science Forum; vol. 561-565, no. PART 1).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

    2 Scopus citations