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Preparation and Characterization of Magnesium Alloy Containing Al₂Y Particles.

Zhongtao Jiang1, Jun Feng2, Qiaowang Chen3

  • 1Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 402160, China. jiangtao6364@163.com.

Materials (Basel, Switzerland)
|September 20, 2018
PubMed
Summary

This study fabricated magnesium alloys with aluminum and yttrium, discovering Al₂Y particles that enhance tensile strength. The findings suggest potential for advanced magnesium matrix composites.

Keywords:
Al2YMg-Y alloysheterogenous nucleationmicrostructure

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Area of Science:

  • Materials Science
  • Metallurgy
  • Composite Materials

Background:

  • Magnesium alloys are lightweight but often require microstructural modification for improved mechanical properties.
  • Incorporating specific intermetallic phases can enhance the performance of magnesium alloys.

Purpose of the Study:

  • To fabricate and characterize magnesium alloys containing aluminum and yttrium (Al₂Y) particles.
  • To investigate the effect of varying aluminum content on the microstructure and mechanical properties of Mg-6Y alloys.
  • To evaluate the potential of these alloys as magnesium master alloys or particle-reinforced composites.

Main Methods:

  • Fabrication of Mg-6Y-xAl alloys with varying aluminum content (x = 0.5-5 wt%).
  • Microstructural characterization to identify Al₂Y particle types and distribution.
  • Mechanical property testing, including tensile strength measurement after hot extrusion.

Main Results:

  • Two distinct types of Al₂Y particles were identified: polygonal in the pre-precipitated phase and network in the eutectic phase.
  • Increasing aluminum content led to an increase in pre-precipitated Al₂Y and a decrease in the eutectic phase.
  • Hot extrusion of the YA65 alloy (5 wt% Al) resulted in significantly improved ambient temperature tensile strength.

Conclusions:

  • The fabricated alloys can serve as magnesium master alloys with heterogeneous nucleation capabilities or as Al₂Y particle-reinforced magnesium matrix composites.
  • The addition of aluminum and the resulting formation of Al₂Y particles effectively enhance the tensile strength of the magnesium alloy.
  • This work demonstrates a viable method for improving magnesium alloy performance through controlled particle formation.