EFFECT OF THE ADDITION OF LI ON THE STRUCTURE AND MECHANICAL PROPERTIES OF HYPOEUTECTIC Al-Mg2Si ALLOYS

Authors

  • Olena Prach National Technical University of Ukraine “KPI” Faculty of Physical Engineering
  • Jakub Horník CTU in Prague Faculty of. Mechanical engineering
  • Kostiantyn Mykhalenkov National Technical University of Ukraine “KPI” Faculty of Physical Engineering

DOI:

https://doi.org/10.14311/AP.2015.55.0253

Keywords:

cast Al-Mg-Si alloys, Li addition, DSC, nanosize precipitation

Abstract

Alloys with various contents of Li were studied by means of  differential scanning calorimetry (DSC), transmission electron microscopy (TEM) and energy dispersive X-Ray microanalysis (EDX).
The TEM investigations revealed that three different types of precipitation are formed in the alloy matrix during artificial aging. Two of the types represent different morphologies of Mg2Si precipitates. The appearance of the third type, identified as the δ-Al3Li phase, shows that the Al-Mg-Si system can be used successfully for designing an Li-containing casting alloy. However, this alloy has not yet been developed.

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Author Biographies

  • Olena Prach, National Technical University of Ukraine “KPI” Faculty of Physical Engineering

    Department of Physicochemical Foundations of Metallurgical Processes

    Material science, casting alloys, Al alloys

     

  • Jakub Horník, CTU in Prague Faculty of. Mechanical engineering

    Department of materials engineering

    Material diagnostic - metallography, electron microscopy

  • Kostiantyn Mykhalenkov, National Technical University of Ukraine “KPI” Faculty of Physical Engineering

    Department of Physicochemical Foundations of Metallurgical Processes

    Material science, casting alloys, Al alloys

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Published

2015-08-31

Issue

Vol. 55 No. 4 (2015)

Section

Articles