Advances in materials Research

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

The effect of lanthanum on the solidification curve and microstructure of Al-Mg alloy during eutectic solidification

  • Xie, Shikun (School of Mechanical and Electrical Engineering, Jinggangshan University) ;
  • Yi, Rongxi (School of Mechanical and Electrical Engineering, Jinggangshan University) ;
  • Guo, Xiuyan (School of Mechanical and Electrical Engineering, Jinggangshan University) ;
  • Pan, Xiaoliang (School of Mechanical and Electrical Engineering, Jinggangshan University) ;
  • Xia, Xiang (School of Mechanical and Electrical Engineering, Jinggangshan University)
  • Received : 2014.12.26
  • Accepted : 2015.07.10
  • Published : 2015.06.25
⟨ Previous Next ⟩

Abstract

The influence of rare earth lanthanum (La) on solidification cooling range, microstructure of aluminum-magnesium (Al-Mg) alloy and mechanical properties were investigated. Five kinds of Al-Mg alloys with rare earth content of La (i.e., 0, 0.5, 1.0, 1.5 and 2.0 wt.%) were prepared. Samples were either slowly cooled in furnace or water cooled. Results indicate that the addition of the rare earth (RE) La can significantly influence the solidification range, the resultant microstructure, and tensile strength. RE La can extend the alloy solidification range, increase the solidification time, and also greatly improve the flow performance. The addition of La takes a metamorphism effect on Al-Mg alloy, resulting in that the finer the grain is obtained, the rounder the morphology becomes. RE La can significantly increase the mechanical properties for its metamorphism and reinforcement. When the La content is about 1.5 wt.%, the tensile strength of Al-Mg alloy reaches its maximum value of 314 MPa.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

References

  1. Bai, J., Sun, Y.S., Xue, F. and Qiang, J. (2012), "Microstructures and creep properties of Mg-4Al-(1-4) La alloys produced by different casting techniques", Mater. Sci. Eng. A., 552, 472-480. https://doi.org/10.1016/j.msea.2012.05.072
  2. Chen, Z.Y., Shu, Q. and Chen, Y.Y. (2007), "The study of microstructure and mechanical properties of high strength and toughness casting Al-Cu alloy", Mater. Technol., 15(5), 718-722.
  3. Chen, Y., Pan, Y., Lu, T., Tao, S.W. and Wu, J.L. (2014), "Effects of combinative addition of lanthanum and boron on grain refinement of Al-Si casting alloys", Mater. Design., 64, 423-426. https://doi.org/10.1016/j.matdes.2014.07.068
  4. Fan, C.H., Chen, G., Yan, H.G. and Chen, Z.H. (2005), "Effect of rare earth in magnesium and magnesium alloys", Mater. Rev., 19(7), 61-64.
  5. Gao, Y., Zhang, W., Li, B., Yuan, L. and Chen, X.N. (2012), "Effect of RE (Y) on diffusion coefficients of tungsten and molybdenum atoms", Rare. Metal. Mar. Eng., 41(12), 2154-2156.
  6. Gao, H.X., Zhang, X.Y., Fan, L., Huang, X. and Gong, X.P.(2014), "Effect of rare earth element La and solid solution treatment on microstructures and mechanical properties of Al-Mg alloy", Foundry., 63(3), 265-268.
  7. Liu, Z. and Hu, Y.M. (2008), "Effect of RE grain-refiner on microstructure of semi-solid ZL101 Al alloy", Foundry., 57(6), 596-599.
  8. Li, Q.F., Wang, L.B., Yu, B.Y., Wang, F. and Yu, H.P. (2006), "Effect of processing parameters on mechanical properties and hot tearing tendency of indirect squeeze casting Al-Cu based alloy", Foundry., 55(12), 1271-1275.
  9. Liang, Y., Wei, S.J. and Ling, M.X. (2013), "Phase equilibria of the Al-Cr-Pr ternary system at 773K", Int. J. Mater. Res., 104(12), 1233. https://doi.org/10.3139/146.110981
  10. Montalba, C., Ramam, K., Eskin, D.G., Ruiz-Navas, E.M. and Prat, O. (2015), "Fabrication of a novel hybrid AlMg5/SiC/PLZT metal matrix composite produced by hot extrusion", Mater. Design., 69, 213-218. https://doi.org/10.1016/j.matdes.2014.12.061
  11. Ma, J.L. and Wen, J.B. (2009), "The effects of lanthanum on microstructure and electrochemical properties of Al-Zn-In based sacrificial anode alloys", Corros. Sci., 51, 2115-2119. https://doi.org/10.1016/j.corsci.2009.05.039
  12. Su, L.H., Lu, C., He, L.Z., Zhang, L.C., Guagliardo, P., Tieu, A.K., Samarin, S.N., Williams, J.F. and Li, H.J. (2012), "Study of vacancy-type defects by positron annihilation in ultrafine-grained aluminum severely deformed at room and cryogenic temperature", Acta. Mater., 60(10), 4218-4228. https://doi.org/10.1016/j.actamat.2012.04.003
  13. Si, N.C., Wu, Q. and Li, G.Q. (2006), "Effect of Ti on thermal fatigue property of Al-4.5%Cu alloy", Foundry., 55(7), 731-734.
  14. Xie, S.K., Yi, R.X., Deng, X.C. and Ai, Y.P. (2010), "Preparation process for semi-solid slurry of Al-4.5Cu alloy", Hot. Work. Technol., 39(5), 21-23.
  15. Yu, P., Zhang, L.C., Zhang, W.Y., Das, J., Kim, K.B. and Eckert, J. (2007), "Interfacial reaction during the fabrication of Ni60Nb40 metallic glass particles-reinforced Al based MMCs", Mater. Sci. Eng. A., 444(1-2), 206-213. https://doi.org/10.1016/j.msea.2006.08.077
  16. Yi, R.X., Xie, S.K., Zheng, X.Q. and Ai, Y.P. (2009), "Effect of RE on performance of semi-solid AlSi7 alloy", Key. Eng. Mater., 426(1), 581-584.
  17. Yi, R.X., Xie, S.K., Wu, W.T., Zheng, X.Q. and Pan, X.L. (2010), "Influence of vibration on microstructure of the aluminum-copper alloy of rare earth Ce", Ord. Mater. Sci. Eng., 33(1), 75-77.
  18. Zhang, W.Q., Li, A.J., Chen, H.Y., Lan, B.Y., Pan, K., Zhang, T.R., Fang, M.X., Liu, S.Y. and Zhang, W. (2012), "The effect of rare earth metals on the microstructure and electrochemical corrosion behavior of lead calcium grid alloys in sulfuric acid solution", J. Power. Sources., 203, 145-152. https://doi.org/10.1016/j.jpowsour.2011.11.067