Semi-solid processing of magnesium alloys

Chang Dong Yim, Hyun Kwang Seok, Jae-chul Lee, Kwang Seon Shin

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Semi-solid processing is an emerging technology for near net-shape production of engineering components. Although there has been a significant progress in semi-solid processing of Al alloys, very limited information is available on semi-solid processing of Mg alloys, except for the thixomolding process. In semi-solid casting process, it is necessary to properly control the flow and solidification behavior of semi-solid slurries for high quality products. There are a number of parameters that affect the flow and solidification behavior of semi-solid slurries such as viscosity, casting pressure, shapes of gate and mold cavity, gate velocity, mold temperature, etc. In the present study, the effects of various thermo-mechanical treatments were investigated on the change in viscosity of the semi-solid AZ91D magnesium alloys by using a concentric cylinder type viscometer. The effects of gate velocity and thickness on mold filling behavior of the semi-solid AZ91D alloys were also investigated by using a high-speed camera and the results were compared with those obtained from computer simulations. From these results and microstructure examination, a processing map for high pressure die casting of the semi-solid AZ91D alloy was constructed in order to produce the sound casting.

Original languageEnglish
Pages (from-to)611-616
Number of pages6
JournalMaterials Science Forum
Volume419-422
Issue numberII
Publication statusPublished - 2003 Apr 21
Externally publishedYes

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Keywords

  • Filling behavior
  • Mg alloy
  • Processing map
  • Rheological behavior
  • Semi-solid processing

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Yim, C. D., Seok, H. K., Lee, J., & Shin, K. S. (2003). Semi-solid processing of magnesium alloys. Materials Science Forum, 419-422(II), 611-616.