Influences of SiC Particle Additions on the Grain Refinement of Mg–Zn Alloys

Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

Authors

  • Yuanding Huang
  • Jiang Gu
  • Sihang You
  • Karl Ulrich Kainer
  • Norbert Hort

A homogeneous microstructure of as-cast magnesium alloys is desired to improve their mechanical properties when achieving lightweighting. Recently, it was demonstrated that the addition of SiC refines both Mg–Al and Mg–Zn alloys. The present work investigates the effect of SiC particle additions on the grain refinement of Mg–Zn alloys, including their addition amount, particle size, addition temperature and holding time. The microstructures were characterized using XRD, SEM and EDS. It was found that the addition of SiC particles refines the grains of Mg–Zn alloys. With increasing their amount and reducing the addition temperature and holding time, the grain size decreases. The optimal SiC particle size for nucleation of alpha-Mg was found to be around 2 µm. The responsible refinement mechanism is attributed to the formation of (Mn, Si)-enriched intermetallics by the interactions between SiC and impurity Mn in alloys.

Original languageEnglish
Title of host publicationMagnesium Technology 2019
EditorsVineet V. Joshi, Neale R. Neelameggham, J. Brian Jordon, Dmytro Orlov
Number of pages8
Place of PublicationCham
PublisherSpringer International Publishing AG
Publication date2019
Pages331-338
ISBN (print)978-3-030-05788-6
ISBN (electronic)978-3-030-05789-3
DOIs
Publication statusPublished - 2019
Externally publishedYes
EventMagnesium Technology Symposium held at the 148th TMS Annual Meeting and Exhibition - TMS 2019 - San Antonio, United States
Duration: 10.03.201914.03.2019
Conference number: 148

    Research areas

  • Grain refinement, Magnesium–Zinc alloys, Microstructure, Solidification
  • Engineering