Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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Mechanical Properties of 7000 Series Aluminium Alloys with Scandium Addition

스칸듐을 첨가한 7000 계열 알루미늄 합금의 기계적 특성

  • Lee, Kyong-Hwan (Department of Steel Industry, Shinsung University) ;
  • Cho, Soo-Youn (Department of Applied Advanced Materials, Korea Polytechnic II Incheon)
  • 이경환 (신성대학교 제철산업과) ;
  • 조수연 (한국폴리텍II대학 인천캠퍼스 신소재응용과)
  • Received : 2012.03.26
  • Accepted : 2012.08.27
  • Published : 2012.08.31
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Abstract

The microstructures of self-designed 7000 series Aluminium alloys added with Sc are observed. Moreover, the mechanical properties of the Sc-added Aluminium alloys are evaluated as a function of tensile temperature to establish the conditions of a following extrusion process. New casting conditions in the aluminium alloys added with Sc could be established by changing the casting speed and stirring time in the existing casting conditions of Aluminium alloys. The Sc addition results in $Al_3(Sc,Zr)$ precipitates in the cast alloys, and leads to the formation of equal-axed grains and fine grains. After homogenization heat treatment at $450^{\circ}C$, the Sc-added Aluminium alloys showed the highest elongation values in the temperature ranging from $300{\sim}400^{\circ}C$.

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References

  1. S. Lee, A. Utsunomiya, H. Akamatsu, K. Neishi, M. Furukawa, Z. Horita and G. Langdont : Acta Mater. "Influence of scandium and zirconium on grain stability and superplastic ductilities in ultrafine-grained Al-Mg alloys", 50(3) (2002) 553-564 https://doi.org/10.1016/S1359-6454(01)00368-8
  2. E. L. Bradley : Master Thesis, University of California at Berkeley, "The Effect of Composition on the Mechanism of continuous Recrystallization and Superplastic Response of Aluminum-Scandium Alloys", (1993)
  3. S. L. Verzasconi and J. W. Morris, Jr. :International Cryogenic Materials Conference Proc., Los Angeles, CA, "Cryogenic Mechanical Properties of Low Density Superplastic Al-Mg-Sc Alloys", 24-28 (1989) 24
  4. T. D. Rostova, V. G. Davydov, V. I. Yelagin and V. V. Zakharov : Mater. Sci. Forum, "Aluminum alloys-Their physical and mechanical properties", 331-337 (2000) 793-798 https://doi.org/10.4028/www.scientific.net/MSF.331-337.793
  5. D. M. Nicholson, J. H. Schneibel, W. A. Shelton, P. Sterne and W. M. Temmerman : MRS Spring Meeting Proc., San Francisco, CA, "The Effect of Scandium on the Phase Stability of Al3Nb and Al3Zr", 186 (1990) 229-236
  6. T. Wirtz, G. Lütjering, A. Gysler, B. Lenczowski and R. Rauh : Mater. Sci. Forum, "Fatigue properties of the aluminium alloys 6013 and Al-Mg-Sc", 331-337 (2000) 1489-1494 https://doi.org/10.4028/www.scientific.net/MSF.331-337.1489
  7. J. Liu and M. Kulak : Mater. Sci. Forum, "A new paradigm in the design of aluminum alloys for aerospace applications", 331-337 (2000) 127-142 https://doi.org/10.4028/www.scientific.net/MSF.331-337.127
  8. B. Lenczowski, T. Hack, D. Wieser, G. Tempus, G. Fischer, J. Becker, K. Folkers, R. Braum and G. Ltjering : Mater. Sci. Forum, "AlMgSc alloys for transportation technology", 331-337 (2000) 957-964 https://doi.org/10.4028/www.scientific.net/MSF.331-337.957
  9. L. Meng and X. L. Zheng : Mat. Sci. Eng. A, "Overview of the effects of impurities and rare earth elements in Al-Li alloys", 237 (1997) 109-118 https://doi.org/10.1016/S0921-5093(97)00096-8