Effect of La addition on precipitation hardening in Mg–10Dy alloy

A. Prasad, S. Si, U. R. Ghori, G. Thirunavukkarasu, Y. L. Chiu, I. P. Jones, S. Y. Lee, S. S. Singh, N. N. Gosvami, J. Jain

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Abstract

The effect of a small lanthanum (La) addition on Mg–10 wt% Dy alloy has been studied using isothermal aging at 120 °C. A combination of scanning transmission electron microscope (STEM) imaging and high-angle annular dark field (HAADF) based electron tomography has been used to characterize the precipitates. βF and β′ precipitates were determined, where βF precipitates form a bridge connecting two β′ precipitates, thus forming a continuous network of precipitates. This network results in a significant increase in hardness.

Original languageEnglish
Article number100898
JournalMaterialia
Volume14
DOIs
Publication statusPublished - Dec 2020

Keywords

  • Electron tomography
  • Mg alloys
  • Microstructure
  • Precipitation hardening
  • STEM

ASJC Scopus subject areas

  • Materials Science(all)

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