Effect of alloying elements on the microstructure and mechanical properties of squeeze cast Mg-Al-Zn-X alloys

Jae Joong Kim, Do Hyang Kim, Sang Hyuk Kim, Nack J. Kim

Research output: Contribution to conferencePaperpeer-review

2 Citations (Scopus)

Abstract

The present study is aimed at improving the mechanical properties of Mg-Al-Zn alloys by squeeze casting and alloy modification. Alloying elements used were Si, P and Ca. It shows that the addition of Si to Mg-Al-Zn alloys results in the formation of Mg2Si particles in two morphologies; coarse polygon and chinese script. The formation of chinese script type Mg2Si particles becomes pronounced as the Al content decreases. The chinese script type Mg2Si particles act as crack nucleation site. Hence the mechanical properties of Si containing alloys are, less than desirable due to the unfavorable morphology of Mg2Si particles. Additional alloying elements have been used to modify the morphology of Mg2Si particles. It has been shown that the addition of Ca or P promotes the formation of fine polygonal type Mg2Si particles by providing the nucleation site for Mg2Si particles. P or Ca modified Mg-Al-Zn-Si alloys have no chinese script type Mg2Si particles which deteriorate the mechanical properties. Such improved microstructure is accompanied by the improvement of mechanical properties.

Original languageEnglish
Pages129-138
Number of pages10
Publication statusPublished - 1997
EventProceedings of the 1997 TMS Annual Meeting - Orlando, FL, USA
Duration: 1997 Feb 91997 Feb 13

Other

OtherProceedings of the 1997 TMS Annual Meeting
CityOrlando, FL, USA
Period97/2/997/2/13

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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