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Effects of Grain Refining Elements on the Mechanical Properties and Mold Filling Ability of AZ91D Alloy

AZ91D 합금의 기계적 성질 및 금형충전성에 미치는 결정립 미세화 원소의 영향

  • Kim, Jeong-Min (Division of Advanced Materials Engineering, Hanbat National University) ;
  • Park, Joon-Sik (Division of Advanced Materials Engineering, Hanbat National University)
  • Received : 2010.03.14
  • Accepted : 2011.03.29
  • Published : 2011.04.30

Abstract

Various grain refining alloying elements such as Sr, TiB, and Ca were added to AZ91D and their effects on the mechanical properties and mold filling ability were investigated. The average grain sizes of those alloys were significantly reduced by the small amounts of the alloying elements. Ca addition was the most remarkably effective in reducing the grain size, however it was found to deteriorate the mold filling ability and tensile properties. TiB addition was observed to be the most efficient for both grain refinement and mold filling.

Keywords

References

  1. P. Cao, M. Qian, D. H. StJohn : Scripta Materialia, "Mechanism for grain refinement of magnesium alloys by superheating", 56 (2007) 633-636 https://doi.org/10.1016/j.scriptamat.2006.12.009
  2. Q. Jin, J. P. Eom, S .G. Lim, W. W. Park, B. S. You : Scripta Materialia, "Grain refining mechanism of a carbon addition method in a Mg-Al magnesium alloy", 49 (2003) 1129-1132 https://doi.org/10.1016/j.scriptamat.2003.07.001
  3. Y. Huang, X. Zheng, B. Liu, O. Anopuo, N. Hort, K. U. Kainer, G. S. Kim : Magnesium Technology, "Grain refinement of Mg- Al alloys by carbon inoculation", (2010) 419-424
  4. H. M. Fu, M. X. Zhang, D. Qiu, P. M. Kelly, J. A. Taylor : J. Alloys Compounds, "Grain refinement by AlN particles in Mg-Al based alloys", 478 (2009) 809-812 https://doi.org/10.1016/j.jallcom.2008.12.029
  5. M. B. Yang, F. S. Pan, R. J. Cheng, A. T. Tang : Trans. Nonferrrous Met. Soc. China, "Effects of Al-10Sr master alloys on grain refinement of AZ31 magnesium alloy", 18 (2008) 52- 58 https://doi.org/10.1016/S1003-6326(08)60010-2
  6. S. A. Torbati-Sarraf, Y. Radi, R. Mahmudi : Proc. of 8th Int. Conf. on Mg alloys & their applications, "The grain refinement of extruded AZ31 magnesium alloy by Al-Ti-B, Al-Ti-C, Al-Sr, and Mg-$Al_2O_3$ nano-composite master alloy", (2010) 187-199
  7. S. K. Guan, S. J. Zhu, L. G. Wang, Q. Yang, W. B. Cao : Trans. Nonferrous Met. Soc. China, "Microstructures and mechanical properties of double hot-extruded AZ80+xSr wrought alloys", 17 (2007) 1143-1151 https://doi.org/10.1016/S1003-6326(07)60240-4
  8. J. M. Kim and J. S. Park : J. of Korea Foundry Society, "Effects of grain refinement and melt stirring on the mechanical properties and fluidity of Mg-Al alloys", 30 (2010) 111-114
  9. Y. Wang, X. Zeng, W. Ding : Scripta Mater., "Effect of Al-4Ti- 5B master alloy on the grain refinement of AZ31 magnesium alloy", 54 (2006) 269-273 https://doi.org/10.1016/j.scriptamat.2005.09.022
  10. L. Han, H. Hu, D. O. Northwood : Mater. Letters, "Effect of Ca additions on microstructure and microhardness of an ascast Mg-5.0wt.%Al alloy", 62 (2008) 381-384 https://doi.org/10.1016/j.matlet.2007.05.047
  11. J. Du, J. Yang, M. Kuwabara, W. Li, J. Peng : J. of Alloys & Compounds, "Improvement of grain refining efficiency for Mg-Al alloy modified by the combination of carbon and calcium", 470 (2009) 134-140 https://doi.org/10.1016/j.jallcom.2008.02.052
  12. J. M. Kim, B. K. Park, J. H. Jun, K. T. Kim, W. J. Jung : Mater. Sci. Forum, "Die-casting capabilities of heat resistant Mg-Al- Ca alloys", 486-487 (2005) 424-427 https://doi.org/10.4028/www.scientific.net/MSF.486-487.424
  13. P. Zhao, Q. Wang, C. Zhai, Y. Zhu : Mater. Sci. Eng., "Effects of strontium and titanium on the microstructure, tensile properties and creep behavior of AM50 alloys", 444 (2007) 318-326 https://doi.org/10.1016/j.msea.2006.08.111
  14. J. E. Gruzleski, A. Aliravci : US Patent 5,143,564, "Low porosity, fine grain sized strontium-treated magnesium alloy castings", (1992)
  15. Y. D. Kwon, Z. H. Lee : Mater. Sci. Eng. A, "The effect of grain refining and oxide inclusion on the fluidity of Al-4.5Cu- 0.6Mn and A356 alloys", 360 (2003) 372-376 https://doi.org/10.1016/S0921-5093(03)00504-5
  16. Q. Han, H. Xu : Scripta Mater., "Fluidity of alloys under high pressure die casting conditions", 53 (2005) 7-10 https://doi.org/10.1016/j.scriptamat.2005.03.025

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