Modification of Mg2Si morphology in squeeze cast Mg-Al-Zn-Si alloys by Ca or P addition

Jae Joong Kim, Do Hyang Kim, K. S. Shin, Nack J. Kim

Research output: Contribution to journalArticle

197 Citations (Scopus)

Abstract

The mechanical properties of Mg2Si containing Mg alloys through the modification of the morphology of Mg2Si particles by Ca or P addition are improved. It shows that the microstructure of squeeze cast Mg-5Al-1Zn-0.7Si alloy contains Chinese script Mg2Si particles. Chinese script type Mg2Si particles acts as crack nucleation sites, resulting in poor mechanical properties in squeeze cast Mg-5Al-1Zn-0.7Si alloy. Addition of Ca or P promotes the formation of fine polygonal type Mg2Si particles by providing the nucleation sites for polygonal type Mg2Si particles. Moreover, the grain size of Ca or P modified Mg-Al-Zn-Si alloys are much finer than that of base alloy.

Original languageEnglish
Pages (from-to)333-340
Number of pages8
JournalScripta Materialia
Volume41
Issue number3
DOIs
Publication statusPublished - 1999 Jul 9

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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