Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
권호 표지
DOI QR코드

DOI QR Code

Effects of Alloying Elements on the Properties of High Strength and High Thermal Conductivity Al-Zn-Mg-Fe Alloy for Die Casting

다이캐스팅용 Al-Zn-Mg-Fe 합금의 특성에 미치는 Zn 및 Mg 첨가의 영향

  • Kim, Ki-Tae (Foundry Technology Center, Korea Institute of Industrial Technology) ;
  • Lim, Young-Suk (Foundry Technology Center, Korea Institute of Industrial Technology) ;
  • Shin, Je-Sik (Foundry Technology Center, Korea Institute of Industrial Technology) ;
  • Ko, Se-Hyun (Foundry Technology Center, Korea Institute of Industrial Technology) ;
  • Kim, Jeong-Min (Dept. of Applied Materials Eng., Hanbat National University)
  • 김기태 (한국생산기술연구원 주조기술센터) ;
  • 임영석 (한국생산기술연구원 주조기술센터) ;
  • 신제식 (한국생산기술연구원 주조기술센터) ;
  • 고세현 (한국생산기술연구원 주조기술센터) ;
  • 김정민 (한밭대학교 신소재공학부)
  • Received : 2013.07.12
  • Accepted : 2013.07.30
  • Published : 2013.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

The effects of alloying elements on the solidification characteristics, microstructure, thermal conductivity, and tensile strength of Al-Zn-Mg-Fe alloys were investigated for the development of high strength and high thermal conductivity aluminium alloy for die casting. The amounts of Zn and Mg in Al-Zn-Mg-Fe alloys had little effect on the liquidus/solidus temperature, the latent heat for solidification, the energy release for solidification and the fluidity of Al-Zn-Mg-Fe alloys. Thermo-physical modelling of Al-Zn-Mg-Fe alloys by the JMatPro program showed $MgZn_2$, AlCuMgZn and $Al_3Fe$ phases in the microstructure of the alloys. Increased amounts of Mg in Al-Zn-Mg-Fe alloys resulted in phase transformation, such as $MgZn_2{\Rightarrow}MgZn_2+AlCuMgZn{\Rightarrow}AlCuMgZn$ in the microstructure of the alloys. Increased amounts of Zn and Mg in Al-Zn-Mg-Fe alloys resulted in a gradual reduction of the thermal conductivity of the alloys. Increased amounts of Zn and Mg in Al-Zn-Mg-Fe alloys had little effect on the tensile strength of the alloys.

Keywords

References

  1. Jang DS, Yu SH and Lee KS, Int. J. Heat & Mass Trans., "Multidisciplinary optimization of a pin-fin radial heat sink for LED lighting applications", 55 (2012) 515-521. https://doi.org/10.1016/j.ijheatmasstransfer.2011.11.016
  2. L. Jen, Y. Xinyan and Z. Wenping, PCT Patent, "High strength, high stress corrosion cracking resistant and castable Al-Zn-Mg- Cu-Zr alloy for shape cast products" WO 2008/036760 (2008).
  3. J. Dong, J.Z. Cui, F.X. Yu, Z.H. Zhao and Y.B. Zhuo, J. Mater. Proc. Tech., "A new way to cast high-alloyed Al-Zn-Mg-Cu-Zr for super-high strength and toughness" 171 (2007) 399-404.
  4. Kim KT, Yang JH and Lim YS, J.KFS, "Effects of Zn amounts on the castability and tensile properties of Al-Zn-Mg- Cu alloys for die casting" 30 (2010) 137-141.
  5. D. Jie, C. Jianzhong, D. Wenjiang, J. Crystal Growth, "Theoretical discussion of the effect of a low-frequency electromagnetic vibrating field on the as-cast microstructures of DC Al-Zn-Mg-Cu-Zr ingots" 295 (2006) 179-187. https://doi.org/10.1016/j.jcrysgro.2006.07.025
  6. J. Dong, J. Cui, X. Zeng and W. Ding, Mater. Letters, "Effect of low-frequency electromagnetic field on microstructures and macrosegregation of $\phi$270 mm DC ingots of Al-Zn-Mg- Cu-Zr alloy" 59 (2005) 1502-1506. https://doi.org/10.1016/j.matlet.2005.01.009
  7. S. Geoffrey K, US Patent, "Method for grain refinement of high strength aluminum casting alloys" 6,645,321 (2003).
  8. Z. Yubo, C. Jianzhong, Z. Zhihao, Z. Haitao, and Q. Ke, Mater. Sci. Eng. A, "Effect of low frequency electromagnetic field on casting crack during DC casting superhigh strength aluminum alloys ingots" 406 (2005) 286-292. https://doi.org/10.1016/j.msea.2005.07.001
  9. B. Zhang, J. Cui and G. Lu, Mater. Sci. Eng. A, "Effect of lowfrequency electromagnetic field on microstructures and macrosegregation of continuous casting 7075 aluminum alloy" 355 (2003) 325-330. https://doi.org/10.1016/S0921-5093(03)00105-9
  10. R.K. Paramatmuni, Chang KM, Kang BS and X. Liu, Mater. Sci. Eng. A, "Evaluation of cracking resistance of DC casting high strength aluminum ingots" 379 (2004) 293-301. https://doi.org/10.1016/j.msea.2004.02.026
  11. E. Gebhardt, M. Becker and S. Dorner, Aluminium, "Effect of alloying additions on the viscosity of aluminum" 31 (1955) 315-321.
  12. Kim JM, Park JS, Kim KT and Ko SH, J.KFS, "Effects of Mg contents on the properties and casting characteristics of Al- 2Zn-0.2Fe-xMg alloys" 32 (2012) 86-90.
  13. Cho JS, Kim JM, Sim WJ and Im HJ, J.KFS, "The influence of alloying elements on the fluidity of Al-Zn-Mg alloys" 32 (2012) 127-132. https://doi.org/10.7777/jkfs.2012.32.3.127
  14. Kim KT, Lim YS and Kim JM, J.KFS, "Effects of Mg and Cu amounts on the casting characteristics and tensile property of Al-Zn-Mg-Cu alloys" 32 (2012) 38-43. https://doi.org/10.7777/jkfs.2012.32.1.038
  15. Shin JS, Kim KT, Ko SH, An DJ and Kim MH, J.KFS, "Design and evaluation of aluminum casting alloys for thermal managing application" 33 (2013) 22-31. https://doi.org/10.7777/jkfs.2013.33.1.022
  16. J. E. Hatch, "Aluminum: Properties and physical metallurgy", ASM (1984).
  17. W. F. Gal and, T. C. Totemeier, "Smithells Metals Reference Book", 8th ed., ASM, Oxford (2004).
  18. A. T. Dinsdale and P. N. Quested, Journal of Materials Science, "The viscosity of aluminum and its alloys-A review of data and models" 39 (2004) 7221-7228. https://doi.org/10.1023/B:JMSC.0000048735.50256.96
  19. M. C. Flemings, "Solidification processing", McGRAWHILL (1974).

Cited by

  1. A Study of Characteristics of the LED Heat Dissipation According to the Changes in Composition of Die-casting Aluminum vol.27, pp.8, 2014, https://doi.org/10.4313/JKEM.2014.27.8.535