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Bulletin of Materials Science

, Volume 6, Issue 3, pp 513–535 | Cite as

Analytical electron microscopy of aluminium alloys

  • T R Ramachandran
  • D C Houghton
  • J D Embury
Article
  • 56 Downloads

Abstract

X-ray microanalysis and electron energy loss spectroscopy of thin foils constitute the important techniques of high resolution chemical analysis using the electron microscope. The technique of x-ray microanalysis is discussed in this paper with particular emphasis on the study of aluminium alloys using a dedicated scanning transmission electron microscope (stem).

The principle of determining chemical composition from observed x-ray peak intensities including the absorption of x-rays and beam broadening in thin foils are considered. The accuracy of peak intensity measurement and detection limits in x-ray microanalysis are illustrated with reference to Al-Mn alloys. The Cliff-Lorimer (k) factors for manganese, iron and copper with respect to aluminium were obtained from standard samples. Identification of phases in 1100 and 1200 aluminium and 3008 (Al-Mn-Zr) alloy were carried out from measured intensities of x-ray peaks. The experimental results emphasize the value of developing techniques for extracting the particles from the aluminium matrix. The transition phases formed in Al-6%Zn-3%Mg and Al-4% Cu were investigated by micro-diffraction and x-ray microanalysis.

Keywords

High resolution analysis x-ray microanalysis aluminium alloy phase identification metastable phases 

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Copyright information

© Indian Academy of Sciences 1984

Authors and Affiliations

  • T R Ramachandran
    • 1
    • 2
  • D C Houghton
    • 1
  • J D Embury
    • 1
  1. 1.Department of Metallurgy and Materials ScienceMcMaster UniversityHamiltonCanada
  2. 2.Department of Metallurgical EngineeringIndian Institute of TechnologyKanpurIndia

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