Identification of quasicrystalline particles in anlsothermally aged Al-10Mg-0.5Ag alloy

Masahiro Kubota, J. F. Nie, B. C. Muddle

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

1 Citation (Scopus)

Abstract

The trace additions of Ag to binary Al-Mg alloys promote precipitation of a phase in the under-aged condition. The structure of the phase in an Al-10Mg-0.5Ag (mass%) alloy have been characterised using transmission electron microscopy and electron microdiffraction. An icosahedral quasicrystalline phase, which is identified by the electron microdiffraction patterns, has been found in the Al-10Mg-0.5Ag (mass%) alloy after solution treatment, water quenched and then aged during the time between 20 and 40 min. at 513K. The orientation relationship between the quasicrystalline phase and the α - Al matrix is as follows; i5 // <011>α and i3 // <111> α. A uniform distribution of finer-scale (typically 20 nm), faceted precipitate icosahedral quasicrystalline particles was observed within the core of the grains, but the precipitates became coarser (60-80 nm) approaching the grain boundary precipitate-free zone. The quasicrystalline particles contain elements of Al, Mg and Ag. The quasicrystalline precipitate particles, which are the metastable phase, appear to be the primary strengthening phase in the Al-10Mg-0.5Ag(mass%) alloy aged at 513K.

Original languageEnglish
Title of host publicationAluminium Alloys 2006
Subtitle of host publicationResearch Through Innovation and Technology - Proceedings of the 10th International Conference on Aluminium Alloys
Pages561-566
Number of pages6
EditionPART 1
Publication statusPublished - 1 Dec 2006
Event10th International Conference on Aluminium Alloys, (ICAA-10) - Vancouver, Canada
Duration: 9 Jul 200613 Jul 2006

Publication series

NameMaterials Science Forum
NumberPART 1
Volume519-521
ISSN (Print)0255-5476

Conference

Conference10th International Conference on Aluminium Alloys, (ICAA-10)
CountryCanada
CityVancouver
Period9/07/0613/07/06

Keywords

  • Age-hardening
  • Al-Mg-Ag alloy
  • Microstuctural characterization
  • Precipitation hardening
  • Quasicrystalline phase

Cite this

Kubota, M., Nie, J. F., & Muddle, B. C. (2006). Identification of quasicrystalline particles in anlsothermally aged Al-10Mg-0.5Ag alloy. In Aluminium Alloys 2006: Research Through Innovation and Technology - Proceedings of the 10th International Conference on Aluminium Alloys (PART 1 ed., pp. 561-566). (Materials Science Forum; Vol. 519-521, No. PART 1).