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Effect of rotating gas bubble stirring process parameters on purifying effectiveness and mechanical properties of sand-cast Mg–10Gd–3Y–0.5Zr alloy

  • Jun Mei (a1), Wencai Liu (a2), Guohua Wu (a3), Lv Xiao (a4) and Wenjiang Ding (a5)...


A continuous nonflux inclusion-removal method, rotating gas bubble stirring, is used to purify Mg–10Gd–3Y–0.5Zr melt. The effects of rotating gas bubble stirring process parameters (Ar flow rate, time, and rotating speed) on purifying effectiveness, mechanical properties, and fracture behavior of sand-cast Mg–10Gd–3Y–0.5Zr alloy are studied. The results show that too high or too low Ar flow rate is unfavorable for inclusion-removal. The results also indicate that the high rotary speed of spraying gas is helpful to improve the inclusion-removal and mechanical properties. But when the melt is subjected to overtime gas bubbling treatment, the mechanical properties became poor again. Nonflux purification does not change the microstructure of Mg–10Gd–3Y–0.5Zr alloy. However, rotating gas bubble stirring has a certain effect on the fracture pattern of the alloy. In addition, the melt purifying mechanism of the gas bubble stirring treatment for the sand-cast alloy was discussed systematically.


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1. Bae, D.H., Kim, S.H., Kim, D.H., and Kim, W.T.: Deformation behavior of Mg–Zn–Y alloys reinforced by icosahedral quasicrystalline particles. Acta Mater. 50, 2343 (2002).
2. Yang, Y. and Liu, Y.B.: High cycle fatigue characterization of two die-cast magnesium alloys. Mater. Charact. 59, 567 (2008).
3. Liu, W.C. and Dong, J.: Fatigue behavior of hot-extruded Mg–10Gd–3Y magnesium alloy. J. Mater. Res. 25, 773 (2010).
4. Feyerabend, F., Fischer, J., Holtz, J., Witte, F., Willumeit, R., Drücker, H., Vogt, C., and Hort, N.: Evaluation of short-term effects of rare earth and other elements used in magnesium alloys on primary cells and cell lines. Acta Biomater. 6, 1834 (2010).
5. Mirza, F.A., Chen, D.L., Li, D.J., and Zeng, X.Q.: Effect of rare earth elements on deformation behavior of an extruded Mg–10Gd–3Y–0.5Zr alloy during compression. Mater. Des. 46, 411 (2013).
6. He, S.M., Zeng, X.Q., Peng, L.M., Gao, X., Nie, J.F., and Ding, W.J.: Precipitation in a Mg–10Gd–3Y–0.4Zr (wt%) alloy during isothermal ageing at 250 °C. J. Alloys Compd. 421, 309 (2006).
7. Chang, J.W., Guo, X.W., He, S.M., Fu, P.H., Peng, L.M., and Ding, W.J.: Investigation of the corrosion for Mg–xGd–3Y–0.4Zr (x = 6%, 8%, 10%, 12%, mass fraction) alloys in a peak-aged condition. Corros. Sci. 50, 166 (2008).
8. Wang, J., Meng, J., Zhang, D.P., and Tang, D.X.: Effect of Y for enhanced age hardening response and mechanical properties of Mg–Gd–Y–Zr alloys. Mater. Sci. Eng., A 456, 78 (2007).
9. Honma, T., Ohkubo, T., Kamado, S., and Hono, K.: Effect of Zn on age hardening and elongation in Mg–2.0Gd–1.2Y–0.2 Zr alloy. Acta Mater. 55, 4137 (2007).
10. Du, W.B., Wu, Y.F., and Nie, Z.R.: Effect of rare earth and alkaline earth on magnesium alloys and their applications status. Rare Met. Mater. Eng. 35, 1345 (2006).
11. Gao, H.T., Wu, G.H., Ding, W., and Zhu, Y.P.J.: Purifying effects of new flux on magnesium alloy. Trans. Nonferrous Met. Soc. China 14, 530 (2004).
12. Wu, G.H., Zhai, C.Q., Zeng, X.Q., Zhu, Y.P., and Ding, W.J.: Study on purification technology of magnesium alloy wastes. Trans. Nonferrous Met. Soc. China 13, 1260 (2003).
13. Xu, S.X., Wu, S.S., and Gao, P.Q.: Effect of technical parameters on purging and degassing of magnesium alloy melt. Chin. J. Nonferrous Met. 19, 217 (2009).
14. Zhao, L., Pan, Y., Liao, H.C., and Wang, Q.G.: Degassing of aluminum alloys during re-melting. Mater. Lett. 66, 328 (2012).
15. Luo, A.A.: Magnesium casting technology for structural applications. J. Magnesium Alloys 1, 2 (2013).
16. Xu, J., Wu, G.H., Liu, W.C., Zhang, Y., and Ding, W.J.: Effects of rotating gas bubble stirring treatment on the microstructures of semi-solid AZ91-2Ca alloy. J. Magnesium Alloys 1, 217 (2013).
17. He, S.M., Zeng, X.Q., Peng, L.M., Gao, X., Nie, J.F., and Ding, W.J.: Microstructure and strengthening mechanism of high strength Mg–10Gd–2Y–0.5Zr alloy. J. Alloys Compd. 427, 316 (2007).
18. Liang, M.J., Wu, G.H., Ding, W.J., and Wang, W.: Effect of inclusion on service properties of GW103K magnesium alloy. Trans. Nonferrous Met. Soc. China 21, 717 (2011).
19. Zhang, L.F. and Taniguchi, S.: Fundamentals of inclusion removal from liquid steel by bubble flotation. Int. Mater. Rev. 45, 59 (2000).
20. Wu, G.H., Dai, J.C., Sun, M., and Ding, W.J.: Non-flux purification behavior of AZ91 magnesium alloy. Trans. Nonferrous Met. Soc. China 20, 2037 (2010).
21. Zhang, L.F., Taniguchi, S., and Matsumoyo, K.: Water model study on inclusion removal from liquid steel by bubble flotation under turbulent conditions. Ironmaking Steelmaking 29, 326 (2002).
22. Zuo, Y.B., Jiang, B., and Zhang, Y.J., and Fan, Z.: Degassing LM25 aluminium alloy by novel degassing technology with intensive melt shearing. Int. J. Cast Met. Res. 26, 16 (2013).



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