Advertisement

Growth ledges on silver-segregated θ′ (Al2Cu) precipitates

  • Julian Rosalie
  • Laure Bourgeois
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

The interfacial structure and composition of θ′ (Al2Cu) precipitates in Al-0.9at.%Cu-0.9at.%Ag alloys were examined using high resolution electron microscopy. High angle annular dark field scanning transmission electron microscope (HAADF-STEM) images showed the presence of a silver(Ag)-rich bi-layer on the coherent (100) θ′-Al interfaces of the precipitates (1). Despite the presence of this layer, growth ledges were observed on the θ′ phase and thickening of the precipitates was able to proceed via ledges of step height 0.5c(θ′).

Keywords

Aluminium alloys Segregation Interfaces Ledges Precipitation 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    J. M. Rosalie, L. Bourgeois, Acta Mater., 60(17):(2012) 6033.Google Scholar
  2. [2]
    J. F. Nie, B. C. Muddle, et al, in J. H. Driver, F. Dubost, B; Durand, et al, eds., Mater. Forum, vol. 217, 1257–1262, 1996.Google Scholar
  3. [3]
    I. J. Polmear, Trans. Metall. Soc. AIME, 230:(1964) 1331.Google Scholar
  4. [4]
    K. Hono, N. Sano, et al, Acta Metall. Mater., 41(3):(1993) 829.Google Scholar
  5. [5]
    E. Okunishi, K. Ibe, et al., J Japan Inst. Metal, 65(5):(2001) 419.Google Scholar
  6. [6]
    C. R. Hutchinson, X. Fan, et al, Acta Mater., 49:(2001) 2827.Google Scholar
  7. [7]
    A. Biswas, D. J. Siegel, et al., Acta Mater., 59(15):(2011) 6187.Google Scholar
  8. [8]
    L. Bourgeois, C. Dwyer, et al, Acta Mater., 59(18):(2011) 7043.Google Scholar
  9. [9]
    J. M. Rosalie, L. Bourgeois, et al, Philos. Mag., 89(25):(2009) 2195.Google Scholar
  10. [10]
    W. M. Stobbs, G. R. Purdy, Acta Metall., 26(7):(1978) 1069.Google Scholar
  11. [11]
    R. C. Pond, J. Hirth, in Solid state physics-advances in research and applications, 47: (1994) 287 Academic Press, 1994.Google Scholar
  12. [12]
    R. C. Pond, F. Sarrazit, Interface Sci., 4(1–2):(1996) 99.Google Scholar
  13. [13]
    R. C. Pond, D. S. Vlachavas, Proc. Royal Soc, Ser. A, 386(1790):(1983) 95.Google Scholar
  14. [14]
    J.P. Hirth, J Phys Chem. Solids, 55(10):(1994) 985.Google Scholar
  15. [15]
    U. Dahmen, H. Westmacott K., Physica Status Solidi A-Applied Research, 80(1):(1983) 249.Google Scholar
  16. [16]
    M. Brown, L. J. R. Dryden, et al, Metall. Mater. Trans. A, 22(6):(1991) 1159.Google Scholar
  17. [17]
    L. Bourgeois, C. Dwyer, et al, Acta Mater., 60(2):(2012) 633.Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 2016

Authors and Affiliations

  • Julian Rosalie
    • 1
  • Laure Bourgeois
    • 2
  1. 1.National Institute for Materials ScienceTsukuba, IbarakiJapan
  2. 2.Monash Centre for Electron MicroscopyMonash UniversityMelbourneAustralia

Personalised recommendations