한국주조공학회지 (Journal of Korea Foundry Society)

  • 제32권2호
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  • Pages.75-80
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  • 2012
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  • 1598-706X(pISSN)
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  • 2288-8381(eISSN)
한국주조공학회 (Korea Foundry Society)
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Ca첨가 반응고 AZ31 마그네슘 합금의 재가열에 따른 미세조직 변화

Microstructure Evolution of Semi Solid AZ31+(Ca) Magnesium Alloys during Reheating Process

  • 김희경 (경상대학교, i-Cube Center, 공학연구원) ;
  • 성봉학 (경상대학교, i-Cube Center, 공학연구원) ;
  • 반근호 (경상대학교, i-Cube Center, 공학연구원) ;
  • 김대환 (경상대학교, i-Cube Center, 공학연구원) ;
  • 성영록 (희성정밀주식회사) ;
  • 임수근 (경상대학교, i-Cube Center, 공학연구원)
  • Kim, Hee-Kyung (i-Cube Center, Engineering Research Institute, Gyeongsang National University) ;
  • Seong, Bong-Hak (i-Cube Center, Engineering Research Institute, Gyeongsang National University) ;
  • Van, Guen-Ho (i-Cube Center, Engineering Research Institute, Gyeongsang National University) ;
  • Kim, Dae-Hwan (i-Cube Center, Engineering Research Institute, Gyeongsang National University) ;
  • Seong, Yeong-Rok (HEESUNG PRECISION. Ltd.) ;
  • Lim, Su-Gun (i-Cube Center, Engineering Research Institute, Gyeongsang National University)
  • 투고 : 2011.02.21
  • 심사 : 2011.03.27
  • 발행 : 2012.04.30
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초록

In this study, we are aimed to prevent grain growth of semi-solid AZ31 magnesium alloys during reheating process. The semi-solid AZ31+(Ca) billets were investigated by using metallographic analysis, X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy in order to elucidate the effect of Ca addition during reheating process. The grain growth of semi-solid AZ31+(Ca) billet was reduced with increasing Ca content during reheating. The grain size of AZ31+(Ca) billet decreased with increasing volume fraction of Al2Ca particles. The grain growth rate constant K calculated by Oswald ripening LSW theory in AZ31+1.5wt.% Ca billet was the lowest 129.

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참고문헌

  1. Atkinson H. V., Modelling the semisolid processing of metallic alloys, Prog Mater Sci, 50 (2005) 341-412 https://doi.org/10.1016/j.pmatsci.2004.04.003
  2. Czerwinski F., Size evolution of the unmelted phase during injection molding of semisolid magnesium alloys, Scripta Mater, 48 (2003) 327-331 https://doi.org/10.1016/S1359-6462(02)00454-2
  3. Czerwinski F., On the generation of thixotropic structures during melting of Mg-9%Al-1%Zn alloy, Acta Mater, 50 (2002) 3265-3281
  4. Z. Fan., Semisolid metal processing, Int. Mater. Rev., 47(2) (2002)
  5. B. H. Choi, B. S. You, W. W. Park, I. M. Park, Oxidation Behaviors of Ca Containing AZ91 Magnesium Alloys, J. Kor. Inst. Met. & Mater, 42(8) (2004) 673-678
  6. B. S. You, M. H. Kim, W. W. Park, I. S. Chung, Oxidation Behaviors of Molten Magnesium Containing Calcium, J. Kor. Inst. Met. & Mater, 39(4) (2001) 446-450
  7. S. L. Cheng, G. C. Yang, J. F. Fan, Y. J. Li, Y. H. Zhou, Effect of Ca and Y additions on oxidation behavior of AZ91 alloy at elevated temperatures, Trans. Nonferrous Met. Soc. China, 19 (2009) 299-304 https://doi.org/10.1016/S1003-6326(08)60268-X
  8. J. H. Kim, N. E. Kang, C. D. Yim, B. K. Kim, Effect of calcium content on the microstructural evolution and mechanical properties of wrought Mg-3Al-1Zn alloy, Materials Science and Engineering A, 525 (2009) 18-29 https://doi.org/10.1016/j.msea.2009.07.048
  9. C. D. Yim, B. S. You, S. H. Kim, J. S. Lee, W. C. Kim, Hot Rolling Properties of Homogenized AZ31-xCa (x = 0$\sim$2.0 wt.%) Gravity Cast, J. Kor. Inst. Met. & Mater, (2004) 521-529
  10. Q. Jin, J. P. Eom, S. G. Lim, W. W. Park, B. S. You, Effect of Ca addition on grain refinement and mechanical properties of AZ31 magnesium alloy, J. of the Korea Foundrymen's society, 23(5) (2003) 251-256
  11. J. P. Eom, S. K. Jeong, S. G. Lim, H. T. Shin, D. S. Jeong, Grain refinement and mechanical properties of AM60 Mg alloy by $CaCN_2$ addition, J. of the Korea Foundrymen's society, 18(4) (2003) 383-388
  12. J. H. Jun, B. K. Park, J. M. Kim, K. T. Kim, W. J. Jung., Microstructures and Mechanical Properties of AZ31-(0-0.5%)Ca Alloys, J. of the Korean Society for Heat Treatment, (2004) 299-304
  13. E. Tzimas, A. Zavallangos., Evaluation of volume fraction of solid in alloys formed by semisolid processing, J. of Materials science, 35 (2000) 5319-5329 https://doi.org/10.1023/A:1004890711322
  14. Edward H., Vol.3 Alloy Phase Diagram, ASM handbook, ASM international, (1992) 555
  15. D. H. Kim., Y. R. Sung., S. Y. Shim., S. Y. Lee., K. S. Kim., S. G. Lim., J. Kor. Foundarymen's Soc. The Microstructures and hot extrudability of semi-solid AM100A magnesium alloy fabricated by cooling plate, 29(3) (2009) 144-149
  16. D. H. Kim., S. Y. Shim., Y. H. Kim., S. G. Lim., J. Kor. Foundarymen's Soc. RRA Treatment of Semi-Solid Al-Zn-Mg-Cu Al alloy Fabricated by Cooling Plate, 29(6) (2009) 265-269
  17. H. W. Park., D. H. Kim., S. Y. Shim., H. K. Kim., B. H. Seong., C. O. Choi., S. G Lim., J. Kor. Foundarymen's Soc. The Effect of Ca Addition on the Grain Growth Inhibition During Reheating Process of Al-Zn-Mg Al Alloys for Thixo-extrusion, 31(6) (2011) 347-353 https://doi.org/10.7777/jkfs.2011.31.6.347
  18. S. Y. Shim., D. H Kim., Y. R Seong., S. G Lim., Statistical Analysis for Influence of Factors on Morphological Evolution in Semi-Solid Al-6Zn-2.5Mg-0.5Cu Alloy by Cooling Plate Method, Materials Transactions, 52(5) (2011) 862-867 https://doi.org/10.2320/matertrans.L-MZ201130
  19. S. W. Xu, N. Matsumoto, K. Yamamoto, S. Kamado, T. Honma, Y. Kojima, High temperature tensile properties of as-cast Mg-Al-Ca alloys, Mater. Sci. Eng. A, 509 (2009) 105-110 https://doi.org/10.1016/j.msea.2009.02.024
  20. H. Watanabe, M. Yamaguchi, Y. Takigawa, K. Higashi, Mechanical properties of Mg-Al-Ca alloy processed by hot extrusion, Mater. Sci. Eng. A, 454-455, (2007) 384-388 https://doi.org/10.1016/j.msea.2006.12.130
  21. J. H. Seo, S. K. Kim, Development trend of high temperature Mg alloys, J. of the Korean Foundary's Society, 28(6) (2008) 243-250
  22. J. Dong, Z. Z. Cui, Q. C. Le, G. M. Lu, Liquidus semi-continuos casting, reheating and thixoforming of a wrought aluminum alloy 7075, Materials Science and Engineering A, 345 (2003) 234-242 https://doi.org/10.1016/S0921-5093(02)00473-2
  23. S. Chayong, H. V. Atkinson, P. Kapranos, Thixoforming 7075 aluminium alloys, Materials Science and Engineering A, 390, (2005) 3-12 https://doi.org/10.1016/j.msea.2004.05.004
  24. S. K. Kim, Y. J. Kim, Semi-liquid forming of Magnesium Alloys, J. of the Korean Foundary's Society, 17(4) (1997) 319-326
  25. P. W. Voorhees, M. E. Glicksman, Solution to the multi-particle diffusion problem with applications to Ostwald ripening-I. Theory, Acta Metallurgica, 32 (1984) 2001-2011 https://doi.org/10.1016/0001-6160(84)90180-9
  26. P. W. Voorhees, M. E. Glicksman, Solution to the multi-particle diffusion problem with applications to Ostwald ripening-II. Computer simulations, Acta Metallurgica, 32 (1984) 2013-2030 https://doi.org/10.1016/0001-6160(84)90181-0
  27. I. M. Lifshitz, V. V. sloyozov, The kinetics of precipitation from supersaturated solid solutions, Journal of Physics and Chemistry of Solids, 19 (1961) 35-50 https://doi.org/10.1016/0022-3697(61)90054-3
  28. C. Wagner, Theorie der Alterung von Niederschlagen durch Umlosen (oswald-riefung), Zeitschrift fur Elektrochemie, 65(7) (1961) 581-591

피인용 문헌

  1. Effect of CaO Addition on the High-temperature Oxidation of AZ31 Magnesium Alloys vol.46, pp.2, 2013, https://doi.org/10.5695/JKISE.2013.46.2.080
  2. CaO 첨가와 열간압연이 마그네슘 합금의 고온산화에 미치는 영향 vol.45, pp.4, 2012, https://doi.org/10.5695/jkise.2012.45.4.155