Microstructural investigations of MG-AL alloys containing small amount of SiC nucleants

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

Authors

  • Yuanding Huang
  • Norbert Hort
  • Okechukwu Anopuo
  • Karl Ulrich Kainer
  • Gabriele Vidrich
  • Andreas Schiffl
  • Yilin Liu

Previous investigations indicated that addition of SiC particles produces a fine microstructure in Mg-Al alloys. This work investigates the microstructure of Mg-Al alloys containing small amount of SiC particles, with an emphasis on the interactions among Mg, Al and SiC It was found that the amount of SiC particles largely decreases after casting. It is very difficultly to detect these SiC particles under SEM and XRD due to their small sizes and amount. SEM and XRD experiments further show the existence of Mg17Al12 and Mg2Si phases. These Chinese scriptlike Mg2Si particles are surrounded by the Mg17Al12 particles which normally locate at the dendritic boundaries. Composition analysis shows carbon enrichment at the grain boundaries. In addition, some micro-cracks were observed close to the dendritic and grain boundaries. All these phenomena illustrate the occurrence of interactions among Mg, Al and SiC Based on these results, the effects of these interactions on the grain refinement are discussed.

Original languageEnglish
Title of host publicationMagnesium Technology 2007 - Proceedings of Symposium Sponsored by the Magnesium Committee of the Light Metals Division of TMS
EditorsRandy S. Beals, Alan A. Luo, Neale R. Neelameggham, Mihriban O. Pekguleryuz
Number of pages6
PublisherThe Minerals, Metals & Materials Society
Publication date2007
Pages421-426
ISBN (print)0873396634, 9780873396639
Publication statusPublished - 2007
Externally publishedYes
Event136th Annual Meeting and Exhibition TMS 2007 : Linking Science and Technology for Global Solutions - Orlando, FL, United States
Duration: 25.02.200701.03.2007
Conference number: 136
https://www.tms.org/Meetings/Annual-07/AnnMtg07Home.html

    Research areas

  • Grain refinement, Mg-Al alloy, Nucleant, SiC
  • Engineering

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