Browse > Article
http://dx.doi.org/10.3740/MRSK.2012.22.2.82

Difference in Solidification Process between Al-Mg Alloy and Al-Si Alloy in Die-Casting  

Choi, Se-Weon (KITECH)
Kim, Young-Chan (KITECH)
Cho, Jae-Ik (KITECH)
Kang, Chang-Seog (KITECH)
Hong, Sung-Kil (Chonnam National University)
Publication Information
Korean Journal of Materials Research / v.22, no.2, 2012 , pp. 82-85 More about this Journal
Abstract
The effect of the alloy systems Al-Mg alloy and Al-Si alloy in this study on the characteristics of die-casting were investigated using solidification simulation software (MAGMAsoft). Generally, it is well known that the casting characteristics of Al-Mg based alloys, such as the fluidity, feedability and die soldering behaviors, are inferior to those of Al-Si based alloys. However, the simulation results of this study showed that the filling pattern behaviors of both the Al-Mg and Al-Si alloys were found to be very similar, whereas the Al-Mg alloy had higher residual stress and greater distortion as generated due to solidification with a larger amount of volumetric shrinkage compared to the Al-Si alloy. The Al-Mg alloy exhibited very high relative numbers of stress-concentrated regions, especially near the rib areas. Owing to the residual stress and distortion, defects were evident in the Al-Mg alloy in the areas predicted by the simulation. However, there were no visible defects observed in the Al-Si alloy. This suggests that an adequate die temperature and casting process optimization are necessary to control and minimize defects when die casting the Al-Mg alloy. A Tatur test was conducted to observe the shrinkage characteristics of the aluminum alloys. The result showed that hot tearing or hot cracking occurred during the solidification of the Al-Mg alloy due to the large amount of shrinkage.
Keywords
Al-Mg; Al-Si; tatur test; die-casting; solidification; residual stress;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 1
연도 인용수 순위
1 A. Kamio, Microstructure and Properties of Aluminum Alloys (in Japanese), p. 233-235, The Jpn. Inst. of Light Met., Japan (1991).
2 Y. C. Kim, C. S. Kang, J. I. Cho, C. Y. Jeong, S. W. Choi and S. K. Hong, J. Mater. Sci. Tech., 24(3), 383 (2008).
3 G. Cao and S. Kou, Mater. Sci. Eng., 417, 230 (2006).   DOI   ScienceOn
4 J. Y. Park, E. S. Kim, Y. H. Park and I. M. Park, Kor. J. Mater, Res., 16(11), 668 (2006) (in Korean).   DOI   ScienceOn
5 J. Campbell, Castings, 2nd ed., p. 205-231, Butterworth Heinemann, an imprint of Elsevier Science, UK (2003).
6 S. Engler and L. Hendrichs, Giessereiforschung, 23(3), 101 (1973).
7 T. Isobe, M. Kubota and S. Kitaoka, J. Jpn. Foundrymen Soc., 50(7), 425 (1978).
8 P. C. Mukherjee and M. P. Dixit, Indian Foundry J., 20(11), 1 (1974).
9 F. Paray, B. Kulunk and J. E. Gruzleski, Int. J. Cast Met. Res., 13, 147 (2000).
10 G. K. Sigworth, AFS Trans., 104, 1053 (1996).
11 T. Tokahashi, M. Kudoh and K. Yodoshi, J. Jpn. Inst. Met., 44(10), 1097 (1980) (in Japanese).   DOI