Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-24T12:43:57.987Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Published online by Cambridge University Press:  12 December 2014

Jun Mei ,
Wencai Liu ,
Guohua Wu ,
Lv Xiao  and
Wenjiang Ding
Jun Mei
Affiliation:
National Engineering Research Center of Light Alloys Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
Wencai Liu*
Affiliation:
National Engineering Research Center of Light Alloys Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China; and Shanghai Light Alloy Net Forming National Engineering Research Center Co., Ltd, Shanghai 201615, China
Guohua Wu*
Affiliation:
National Engineering Research Center of Light Alloys Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
Lv Xiao
Affiliation:
Shanghai Aviation Precision Machinery Research Institute, Shanghai 201600, China
Wenjiang Ding
Affiliation:
National Engineering Research Center of Light Alloys Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
Get access

Abstract

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.

Keywords

magnesium alloysand-castpurificationrotating gas bubble stirring
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 2 , 28 January 2015 , pp. 224 - 232
Copyright
Copyright © Materials Research Society 2015 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

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).CrossRefGoogle Scholar
Yang, Y. and Liu, Y.B.: High cycle fatigue characterization of two die-cast magnesium alloys. Mater. Charact. 59, 567 (2008).CrossRefGoogle Scholar
Liu, W.C. and Dong, J.: Fatigue behavior of hot-extruded Mg–10Gd–3Y magnesium alloy. J. Mater. Res. 25, 773 (2010).CrossRefGoogle Scholar
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).CrossRefGoogle ScholarPubMed
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).CrossRefGoogle Scholar
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).CrossRefGoogle Scholar
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).CrossRefGoogle Scholar
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).CrossRefGoogle Scholar
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).CrossRefGoogle Scholar
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).Google Scholar
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).Google Scholar
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).Google Scholar
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).Google Scholar
Zhao, L., Pan, Y., Liao, H.C., and Wang, Q.G.: Degassing of aluminum alloys during re-melting. Mater. Lett. 66, 328 (2012).CrossRefGoogle Scholar
Luo, A.A.: Magnesium casting technology for structural applications. J. Magnesium Alloys 1, 2 (2013).CrossRefGoogle Scholar
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).CrossRefGoogle Scholar
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).CrossRefGoogle Scholar
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).CrossRefGoogle Scholar
Zhang, L.F. and Taniguchi, S.: Fundamentals of inclusion removal from liquid steel by bubble flotation. Int. Mater. Rev. 45, 59 (2000).CrossRefGoogle Scholar
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).CrossRefGoogle Scholar
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).CrossRefGoogle Scholar
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).CrossRefGoogle Scholar