Refinement of Al-Si eutectic grains - A novel method to produce high integrity Al-Si alloy castings

Liming Lu, Kazuhiro Nogita, Arne K. Dahle

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


Eutectic modification with Sr, Na or Sb yields a refined fibrous silicon morphology which can improve the tensile ductility of cast Al-Si alloys. However, many companies choose not to use modifiers due to increased scrap rates and negligible beneficial effects on the mechanical properties because of alterations in the porosity characteristics of the castings. Here we report a novel method to modify Al-Si alloys which reduces the porosity of the castings while maintaining the well-modified silicon structure, thus producing consistent high performance Al-Si alloy castings. This new invention is based on the grain refinement of the Al-Si eutectic grains, or cells.

Original languageEnglish
Title of host publicationLight Metals 2007 - Proceedings of the Technical Sessions presented by the TMS Aluminum Committee at the TMS 2007 Annual Meeting and Exhibition
Number of pages6
Publication statusPublished - 2007
Externally publishedYes
EventTMS 2007 Annual Meeting and Exhibition - Orlando, FL, United States
Duration: Feb 25 2007Mar 1 2007

Publication series

NameTMS Light Metals
ISSN (Print)0147-0809


OtherTMS 2007 Annual Meeting and Exhibition
Country/TerritoryUnited States
CityOrlando, FL

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry


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