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Effect of Al on Grain Refinement and Mechanical Properties of Mg-3Nd Casting Alloy

  • Lei Wang
  • Yicheng Feng
  • Liping Wang
  • Yanhong Chen
  • Erjun Guo
Article

Abstract

The effect of Al on the grain refinement and mechanical properties of as-cast Mg-3Nd alloy was investigated systematically by a series of microstructural analysis, solidification analysis and tensile tests. The results show that Al has an obvious refining effect on the as-cast Mg-3Nd alloy. With increasing Al content, the grain size of the as-cast Mg-3Nd alloy decreases firstly, then increases slightly after the Al content reaching 3 wt.%, and the minimum grain size of the Mg-3Nd alloy is 48 ± 4.0 μm. The refining mechanism can be attributed to the formation of Al2Nd particles, which play an important role in the heterogeneous nucleation. The strength and elongation of the Mg-3Nd alloy refined by Al also increase with increasing Al content and slightly decrease when the Al content is more than 3 wt.%, and the strengthening mechanism is attributed to the grain refinement as well as dispersed intermetallic particles. Furthermore, the microstructural thermal stability of the Mg-3Nd-3Al alloy is higher than that of the Mg-3Nd-0.5Zr alloy. Overall, the Mg-3Nd alloy with Al addition is a novel alloy with wide and potential application prospects.

Keywords

grain refinement mechanical properties Mg-3Nd alloy thermal stability 

Notes

Acknowledgments

The authors gratefully acknowledge the financial support from the Heilongjiang Province Natural Science Foundation (No. ZD2016011).

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Copyright information

© ASM International 2018

Authors and Affiliations

  • Lei Wang
    • 1
  • Yicheng Feng
    • 1
  • Liping Wang
    • 1
  • Yanhong Chen
    • 1
  • Erjun Guo
    • 1
  1. 1.School of Materials Science and EngineeringHarbin University of Science and TechnologyHarbinChina

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