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Metals and Materials International

, Volume 25, Issue 5, pp 1235–1245 | Cite as

Correlation Between Primary Si and Silicide Refinement Induced by Ultrasonic Treatment of Multicomponent Al–Si Alloy Containing Ti, Zr, V, and P

  • Jae-Gil Jung
  • Young-Hee Cho
  • Tae-Young Ahn
  • Jae-Hee Yoon
  • Sang-Hwa Lee
  • Jung-Moo LeeEmail author
Article
  • 73 Downloads

Abstract

The correlation between primary Si and silicide refinement induced by ultrasonic treatment (UST) of multicomponent Al–Si alloy containing Ti, Zr, V, and P was investigated. UST significantly refined the primary Si phase owing to cavitation-induced wetting and deagglomeration of MgAl2O4 particles. Lowering the UST finish temperature caused deterioration of the degree of primary Si refinement, instead leading to silicide refinement. Cavitation-induced silicide nucleation on wetted MgAl2O4 consumed the MgAl2O4 particles, particularly in the case of primary Si nucleation. Similarly, the formation of an AlP phase on the silicide phase reduced the nucleation efficiency of the AlP phase. Poisoning of the MgAl2O4 and AlP phases by the silicide phase was responsible for the deterioration in primary Si refinement. Room-temperature tensile strength and high-temperature elongation were increased by UST and were dependent on the size of primary Si.

Keywords

Aluminum alloy Ultrasonics Solidification Nucleation Mechanical properties 

Notes

Acknowledgements

This work was supported by the WC300 R&D program (S2317902) funded by the Ministry of SMEs and Startups.

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Copyright information

© The Korean Institute of Metals and Materials 2019

Authors and Affiliations

  • Jae-Gil Jung
    • 1
  • Young-Hee Cho
    • 1
  • Tae-Young Ahn
    • 2
  • Jae-Hee Yoon
    • 1
  • Sang-Hwa Lee
    • 1
  • Jung-Moo Lee
    • 1
    Email author
  1. 1.Metallic Materials DivisionKorea Institute of Materials ScienceChangwonRepublic of Korea
  2. 2.Nuclear Materials Safety Research DivisionKorea Atomic Energy Research InstituteDaejeonRepublic of Korea

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