TEM observations of precipitates structure of Al-1.0mass%Mg2ge alloys aged at 473K

Akihiro Kawai, Keisuke Matsuura, Katsumi Watanabe, Kenji Matsuda*, Susumu Ikeno

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

It is known that Al-Mg-Ge alloys show a similar precipitation sequence to that of Al-Mg-Si alloys, and that ther equilibrium phase is β-Mg2Ge according to the phase diagram. In this study, the precipitation sequence and age-hardening behavior of Al-1.0mass%Mg2Ge alloys has been investigated by hardness test, write out in full first time used TEM and HRTEM observations on.The hardness curves showed no big difference between peak values hardness for samples aged at 423, 473 and 523K. The precipitates in the peak-aged samples have been classified as some metastable phases, such as the β'-phase and parallelogram-type precipitates by HRTEM observation. The large precipitates are similar to the A-type precipitate in the Al-Mg-Si alloy with excess Si.

Original languageEnglish
Title of host publicationAluminium Alloys, ICAA 2014
EditorsKnut Marthinsen, Bjørn Holmedal, Yanjun Li
PublisherTrans Tech Publications Ltd
Pages992-995
Number of pages4
ISBN (Print)9783038351207
DOIs
StatePublished - 2014
Event14th International Conference on Aluminium Alloys, ICAA 2014 - Trondheim, Norway
Duration: 2014/06/152014/06/19

Publication series

NameMaterials Science Forum
Volume794-796
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference14th International Conference on Aluminium Alloys, ICAA 2014
Country/TerritoryNorway
CityTrondheim
Period2014/06/152014/06/19

Keywords

  • Age hardening
  • Al-Mg-Ge alloy
  • HRTEM
  • Precipitation
  • TEM

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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