Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Ca additions on Mechanical Properties of Mg-4Al-2Sn-xCa Die-Casting Alloys

Ca 첨가에 따른 Mg-4Al-2Sn-xCa 다이캐스팅 합금의 기계적특성 연구

  • Kim, Young-Min (Dongnam Technology Application Division, Korea Institute of Industrial Technology) ;
  • Lee, Young-Cheol (Dongnam Technology Application Division, Korea Institute of Industrial Technology) ;
  • Park, Yong-Ho (Department of Materials Science and Engineering, Pusan National University)
  • 김영민 (한국생산기술연구원 동남권 지역본부) ;
  • 이영철 (한국생산기술연구원 동남권 지역본부) ;
  • 박용호 (부산대학교 신소재공학부)
  • Received : 2011.09.06
  • Accepted : 2011.10.12
  • Published : 2011.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

Representative magnesium alloys applied to the die-casting are AZ91, AM60, etc., and the application of these alloys is restricted to components operating at moderate temperatures, due to grain boundary siding of ${\beta}$-phase($Mg_{17}Al_{12}$) at temperatures above $120^{\circ}C$. Heat-resistant magnesium alloys such as AE42, AE44 have been developed, but that have been too burdensome to produce because of the expensive rare earth materials. Research work for the development of low-priced heat-resistant magnesium alloy is actively in progress and positive results are being reported. This study aims to investigate the effect of Ca additions on mechanical properties of Mg-4Al-2Sn heat resistant magnesium alloys. Mg-4Al-2Sn alloys with Ca (0wt.%, 0.3wt.%, 0.7wt.%, 1wt.%) have been produced through the die-casting process for the development of low-priced heat-resistant magnesium alloy, and high temperature tensile tests are performed using the specimens. The results showed that mechanical properties of Mg-4Al-2Sn-xCa increased with the addition of Ca up to 0.7wt.% Ca and further addition of Ca deteriorated the mechanical properties of the alloys. A significant amount of porosity was observed at the sample with 1wt%. Ca and the longer freezing range of the alloy was believed to cause the formation of porosity.

Keywords

References

  1. M. M. Avedesian and hugh Baker: "Magnesium and Magnesium alloys" ASM Specialty Handbook, (1999) 3-7
  2. Alan A. Luo: JOM, "Magnesium-Current and Potential Automotive Applications" 54(2) (2002) 42-48 https://doi.org/10.1007/BF02701073
  3. Alan A. Luo; Int. Mater. Rev. 49 (2004) 13-30 https://doi.org/10.1179/095066004225010497
  4. Naomi Nishi: J. Kor. Foundrymen's Soc, "History of Magnesium Die Casting" 29(1) (2009) 20-26
  5. Frank Czerwinski: "Magnesium Alloys-Design, Processing and Properties" InTech, (2011) 265-266
  6. Ming-bo YANG, Liang CHENG and Fu-sheng PAN: Transactions of Nonferrous Metals Society of China, "Comparison of as-cast microstructure, tensile and creep properties for Mg-3Sn-1Ca and Mg-3Sn-2Ca magnesium alloys", 20 (2010) 584-589 https://doi.org/10.1016/S1003-6326(09)60182-5
  7. Mingbo Yang, Fusheng Pan, Liang Cheng and Jia Shen:: Mater. Sci. Eng.(A), "Effects of cerium on as-cast microstructure and mechanical properties of Mg-3Sn-2Ca magnesium alloy" 512 (2009) 132-138 https://doi.org/10.1016/j.msea.2009.02.038
  8. Alan A. Luo: "Cast magnesium alloys for elevated temperature applications" 29(20) (1994) 5259-5271 https://doi.org/10.1007/BF01171534
  9. S. H. Ha, J. K. Lee, S. K. Kim: J. Kor. Foundrymen's Soc, "Development trend of high temperature Mg alloys" 27(5) (2007) 193-197
  10. B. H. Kim, K. C. Park, Y. H. Park and I. M. Park: Mater. Sci. Eng.(A), "Investigations of the properties of Mg-4Al-2Sn-1CaxCe alloys" 527 (2010) 6372-6377 https://doi.org/10.1016/j.msea.2010.06.055
  11. B. H. Kim, K. C. Park, Y. H. Park and I. M. Park: Mater. Sci. Eng.(A), "Effect of Ca and Sr additions on high temperature and corrosion properties of Mg-4Al-2Sn based alloys" 528 (2011) 808-814 https://doi.org/10.1016/j.msea.2010.10.038
  12. Y. C. Lee, A. K. Dahile, D. H. Stjohn : Metall. Mater. Trans. A, Vol. 31A, November (2000) 2895
  13. N. E. Kang : Pusan Univ, "Effect of Ca addition in the Mechanical Property and Deformation Behavior of AZ31 Magnesium Alloy Extrusions" 2010
  14. B. Andresen: "Die Casting Engineering", Marcel Dekker, New York, NY, (2005) 209-236
  15. A. K. Dahle, D. H. Stjohn :UNESCO Encyclopedia of Life Support Systems, in press, "Processing from the liquid state"
  16. A. K. Dahle, Y. C. Lee, M. D. Nave, P. L. Schaffer, D. H. Stjohn : Journal of Light Metals, "Development of the As-Cast Microstructure in Magnesium-Aluminium Alloys", 1(1), (2001) 61-72 https://doi.org/10.1016/S1471-5317(00)00007-9
  17. B. H. Kim, K. C. Park, Y. H. Park and I. M. Park: Transactions of Nonferrous Metals Society of China, "Microstructure and creep properties of Mg-4Al-2Sn-1(Ca,Sr)alloys", 20 (2010) 1184-1191 https://doi.org/10.1016/S1003-6326(09)60276-4
  18. C. Zhang, H. Cao, V. Firouzdor a, S. Kou a, Y. A. Chang : Intermetallics, "Microstructure investigations of directionally solidified Mg-rich alloys containing Al, Ca and Sn" 18 (2010) 1597-1602 https://doi.org/10.1016/j.intermet.2010.04.017

Cited by

  1. (Mg + Al2Ca)로 개량된 AA7075 합금의 미세조직, 기계적 특성, 그리고 고주기 피로 특성에 미치는 T6 및 T73 열처리의 효과 vol.30, pp.1, 2011, https://doi.org/10.5228/kstp.2021.30.1.5