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

Fingerprint

magnesium alloys
Magnesium alloys
Processing
slurries
Casting
Slurries
solidification
Solidification
Viscosity
viscosity
thermomechanical treatment
concentric cylinders
Thermomechanical treatment
viscometers
Die casting
Viscometers
high speed cameras
High speed cameras
emerging
examination

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.

Semi-solid processing of magnesium alloys. / Yim, Chang Dong; Seok, Hyun Kwang; Lee, Jae-chul; Shin, Kwang Seon.

In: Materials Science Forum, Vol. 419-422, No. II, 21.04.2003, p. 611-616.

Research output: Contribution to journalArticle

Yim, CD, Seok, HK, Lee, J & Shin, KS 2003, 'Semi-solid processing of magnesium alloys', Materials Science Forum, vol. 419-422, no. II, pp. 611-616.
Yim CD, Seok HK, Lee J, Shin KS. Semi-solid processing of magnesium alloys. Materials Science Forum. 2003 Apr 21;419-422(II):611-616.
Yim, Chang Dong ; Seok, Hyun Kwang ; Lee, Jae-chul ; Shin, Kwang Seon. / Semi-solid processing of magnesium alloys. In: Materials Science Forum. 2003 ; Vol. 419-422, No. II. pp. 611-616.
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