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Journal of Materials Engineering and Performance

, Volume 28, Issue 1, pp 475–484 | Cite as

Effects of Vanadium on Modification of Iron-Rich Intermetallics and Mechanical Properties in A356 Cast Alloys with 1.5 wt.% Fe

  • Bo LinEmail author
  • Haoyu Li
  • Rui Xu
  • Huaqiang XiaoEmail author
  • Weiwen Zhang
  • Shaobo Li
Article
  • 54 Downloads

Abstract

Formation of Fe-rich intermetallics and mechanical properties of vanadium-modified A356 cast alloys with 1.5 wt.% Fe were investigated using image analysis, scanning electron microscopy, differential scanning calorimetry, and a tensile test. The results showed that V content has no apparent influence on α-Al grain size in A356 alloys with high Fe content. Also, 0.8 wt.% V is beneficial for improving mechanical properties in A356 cast alloys with high Fe content. Specifically, these results can be attributed to the formation of Chinese script or block α-Fe phases, refined needle-like β-Fe (Al5FeSi), and decreased porosities. An excessive amount of V deteriorates mechanical properties of alloys because it leads to VSi2 formation, large sized iron-rich intermetallics, and increased porosities.

Keywords

aluminum casting and solidification intermetallics 

Notes

Acknowledgments

The financial support from the Research Found for National Natural Science Foundation of China (51704084), China postdoctoral Science Foundation (2017M623068), Science and Technology Foundation of Gui Zhou Province of China [JC(2016)1026)], Young Talent Growth Foundation of Education Department of Gui Zhou Province of China [KY(2017)101)], and Science and Technology Plan Project of Gui Zhou Province of China [RC 2017(5788)]. Special thanks to Zhi Luo, Yuliang Zhao, Zhaohui Lou, and He Li for their assistance.

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Copyright information

© ASM International 2018

Authors and Affiliations

  1. 1.Key Laboratory of Advanced Manufacturing Technology, Ministry of EducationGui Zhou UniversityGuiyangPeople’s Republic of China
  2. 2.School of Mechanical EngineeringGui Zhou UniversityGuiyangPeople’s Republic of China
  3. 3.School of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhouPeople’s Republic of China

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