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      https://www.ias.ac.in/article/fulltext/boms/006/03/0513-0535

    • Keywords

       

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

    • 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.

    • Author Affiliations

       

      T R Ramachandran1 2 D C Houghton1 J D Embury1

      1. Department of Metallurgy and Materials Science, McMaster University, Hamilton, Ontario, Canada
      2. Department of Metallurgical Engineering, Indian Institute of Technology, Kanpur - 208 016, India
    • Dates

       
  • Bulletin of Materials Science | News

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