TEM observation of metastable phases in aged Al-Mg-Ge alloys

Kenji Matsuda, Junya Nakamura, Keisuke Yamamoto, Tokimasa Kawabata, Yasuhiro Uetani, Susumu Ikeno

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The purpose of study is to investigate aging behavior, crystal structures of metastable phase and relative frequency of metastable phases in aged Al-Mg-Ge and Al-Mg-Ge-Si alloys using high resolution transmission electron microscope (HRTEM), energy dispersive X-ray spectroscopy (EDS) and electron energy-loss spectroscopy (EELS). Every alloy included rod-shaped precipitate which is the same as the typical metastable phase, β', in Al-Mg-Si alloy. Except to Mg-rich alloys, the Type-A precipitate, which is a typical metastable phase in the excess Si type Al-Mg-Si alloys and popular at over aged condition, was confirmed as a large rod-shaped precipitates in those alloys. This behavior is probably depends on the ratio of Mg/Ge. Also, Mg, Si and Ge were detected from the β'-phase in Al-Mg-Ge-Si alloy by EELS. This means that the β'-phase in Al-Mg-Ge-Si alloy consists of these 3 elements including Si, not just Ge to form metastable Mg2Ge.

Original languageEnglish
Title of host publicationPRICM7
PublisherTrans Tech Publications Ltd
Pages930-933
Number of pages4
ISBN (Print)0878492550, 9780878492558
DOIs
Publication statusPublished - 2010 Jan 1
Event7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7 - Cairns, QLD, Australia
Duration: 2010 Aug 22010 Aug 6

Publication series

NameMaterials Science Forum
Volume654-656
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7
CountryAustralia
CityCairns, QLD
Period10/8/210/8/6

Keywords

  • Al-Mg-Ge alloy
  • EDS
  • Elemental map
  • HRTEM
  • Metastable phase
  • Precipitation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Matsuda, K., Nakamura, J., Yamamoto, K., Kawabata, T., Uetani, Y., & Ikeno, S. (2010). TEM observation of metastable phases in aged Al-Mg-Ge alloys. In PRICM7 (pp. 930-933). (Materials Science Forum; Vol. 654-656). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.654-656.930