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The effect of addition of cerium on the grain refinement of Mg–3Al–1Zn cast alloy

Published online by Cambridge University Press:  18 September 2013

Bin Jiang*
Affiliation:
National engineering research center for magnesium alloys, Chongqing University, Chongqing, 400030, China; and College of Materials Science and Engineering, Chongqing University, Chongqing, 400030, China
Ying Zeng
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing, 400030, China
Mingxing Zhang
Affiliation:
Division of Materials, School of Mechanical and Mining Engineering, University of Queensland, St Lucia, Queensland 4072, Australia
Jichao Liao
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing, 400030, China
Fusheng Pan
Affiliation:
National engineering research center for magnesium alloys, Chongqing University, Chongqing, 400030, China; and College of Materials Science and Engineering, Chongqing University, Chongqing, 400030, China
*
a)Address all correspondence to this author. e-mail: jiangbinrong@cqu.edu.cn
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Abstract

The microstructures of the cast Mg–3Al–1Zn–xCe (x = 0, 0.2, 0.4, 0.8, and 1.2 wt%) alloys produced by twin-roll casting were observed to reveal the effect of cerium (Ce) on the Mg–3Al–1Zn (AZ31) alloy. Transmission electron microscopy (TEM) image of Al4Ce particles at the centers of grains was observed, and the crystallographic calculations between Al4Ce and α-Mg were examined on the basis of the edge-to-edge matching model. The results indicated that the addition of Ce effectively reduces the grain size of the cast AZ31 alloy produced by twin-roll casting. The finest grains with an average grain size of 55 μm are achieved at 0.4 wt% addition of Ce. TEM observation and good crystallographic matching between Al4Ce and α-Mg suggest that promotion of heterogeneous nucleation of α-Mg on Al4Ce particles formed in the melt is responsible for the grain refinement when adding Ce to the cast AZ31 alloy.

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Articles
Copyright
Copyright © Materials Research Society 2013 

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References

REFERENCES

Easton, M. and StJohn, D.: Grain refinement of aluminum alloys: Part II. Confirmation of, and a mechanism for, the solute paradigm. Metall. Mater. Trans. A 30, 16251633 (1999).CrossRefGoogle Scholar
Han, G., Liu, X.F., and Ding, H.M.: Grain refinement of Mg–Al based alloys by a new Al–C master alloy. J. Alloys Compd. 467, 202207 (2009).Google Scholar
Li, W.P., Zhou, H., and Li, Z.F.: Effect of gadolinium on microstructure and rolling capability of AZ31 alloy. J. Alloys Compd. 475, 227232 (2009).CrossRefGoogle Scholar
Tian, X., Wang, L.M., Wang, J.L., Liu, Y.B., An, J., and Cao, Z.Y.: The microstructure and mechanical properties of Mg-3Al-3RE alloys. J. Alloys Compd. 465, 412416 (2008).CrossRefGoogle Scholar
Du, J., Yang, J., Kuwabara, M., Li, W., and Peng, J.: Effect of strontium on the grain refining efficiency of Mg–3Al alloy refined by carbon inoculation. J. Alloys Compd. 470, 228232 (2009).CrossRefGoogle Scholar
Du, J., Yang, J., Kuwabara, M., Li, W., and Peng, J.: Improvement of grain refining efficiency for Mg–Al alloy modified by the combination of carbon and calcium. J. Alloys Compd. 470, 134140 (2009).CrossRefGoogle Scholar
Fu, H.M., Qiu, D., Zhang, M.X., Wang, H., Kelly, P.M., and Taylor, J.A.: The development of a new grain refiner for magnesium alloys using the edge-to-edge model. J. Alloys Compd. 456, 390394 (2008).CrossRefGoogle Scholar
Dahle, A.K., Lee, Y.C., Nave, M.D., Schaffer, P.L., and StJohn, D.H.: Development of the as-cast microstructure in magnesium–aluminium alloys. J. Light Met. 1, 6172 (2001).CrossRefGoogle Scholar
Fu, H.M., Zhang, M.X., Qiu, D., Kelly, P.M., and Taylor, J.A.: Grain refinement by AlN particles in Mg–Al based alloys. J. Alloys Compd. 478, 809812 (2009).CrossRefGoogle Scholar
Wang, Y., Zeng, X., and Ding, W.: Effect of Al–4Ti–5B master alloy on the grain refinement of AZ31 magnesium alloy. Scr. Mater. 54, 269273 (2006).CrossRefGoogle Scholar
Liu, S., Zhang, Y., Han, H., and Li, B.: Effect of Mg–TiB2 master alloy on the grain refinement of AZ91D magnesium alloy. J. Alloys Compd. 487, 202205 (2009).CrossRefGoogle Scholar
Han, G., Liu, X.F., and Ding, H.M.: Grain refinement of AZ31 magnesium alloy by new Al-Ti-C master alloys. Trans. Nonferrous Met. Soc. 19, 10571064 (2009).CrossRefGoogle Scholar
Qiu, D. and Zhang, M.X.: Effect of active heterogeneous nucleation particles on the grain refining efficiency in an Mg–10wt.% Y cast alloy. J. Alloys Compd. 488, 260264 (2009).CrossRefGoogle Scholar
Qiu, D., Zhang, M.X., Taylor, J.A., and Kelly, P.M.: A new approach to designing a grain refiner for Mg casting alloys and its use in Mg–Y-based alloys. Acta Mater. 57, 30523059 (2009).CrossRefGoogle Scholar
Qiu, D., Zhang, M.X., and Kelly, P.M.: Crystallography of heterogeneous nucleation of Mg grains on Al2Y nucleation particles in an Mg–10wt.% Y alloy. Scr. Mater. 61, 312315 (2009).CrossRefGoogle Scholar
Ding, P.D., Pan, F.S., Jiang, B., Wang, J., Li, H.L., Wu, J.C., Xu, Y.W., and Wen, Y.: Twin-roll strip casting of magnesium alloys in China. Trans. Nonferrous Met. Soc. 18(Suppl 1), s7s11 (2008).CrossRefGoogle Scholar
Liang, D. and Cowley, C.B.: The twin-roll strip casting of magnesium. JOM 56, 2628 (2004).CrossRefGoogle Scholar
Jiang, B., Gao, L., Huang, G.J., Ding, P.D., and Wang, J.: Effect of extrusion processing parameters on microstructure and mechanical properties of as-extruded AZ31 sheets. Trans. Nonferrous Met. Soc. 18(Suppl 1), s160–s4 (2008).CrossRefGoogle Scholar
Li, X.K., Jiang, B., and Liao, J.C.: Effects of Al and Ca on microstructure and surface defect of magnesium alloy thin strip. Trans. Nonferrous Met. Soc. 20(Suppl 2), s361–s5 (2010).CrossRefGoogle Scholar
Bae, G.T., Bae, J.H., Kang, D.H., Lee, H., and Kim, N.J.: Effect of Ca addition on microstructure of twin-roll cast AZ31 Mg alloy. Met. Mater. Int. 15, 15 (2009).CrossRefGoogle Scholar
Qian, B.G., Geng, H.R., Tao, Z.D., Zhao, P., and Tian, X.F.: Effects of Ca addition on microstructure and properties of AZ63 magnesium alloy. Trans. Nonferrous Met. Soc. 14, 987991 (2004).Google Scholar
Wang, Y., Kang, S.B., and Cho, J.: Microstructural evolution of twin-roll cast Mg–3Al–0.5Mn–0.2Mm alloys during warm rolling and subsequent annealing. J. Mater. Process. Manuf. Sci. 210, 12701275 (2010).CrossRefGoogle Scholar
StJohn, D.H., Qian, M., Easton, M.A., Cao, P., and Hildebrand, Z.: Grain refinement of magnesium alloys. Metall. Mater. Trans. A. 36, 16691679 (2005).CrossRefGoogle Scholar
StJohn, D.H., Qian, M., Easton, M.A., and Cao, P.: The interdependence theory: The relationship between grain formation and nucleant selection. Acta Mater. 59, 49074921 (2011).CrossRefGoogle Scholar
Qian, M., Cao, P., Easton, M.A., McDonald, S.D., and StJohn, D.H.: An analytical model for constitutional supercooling-driven grain formation and grain size prediction. Acta Mater. 58, 32623270 (2010).CrossRefGoogle Scholar
Lee, Y.C., Dahle, A.K., and StJohn, D.H.: The role of solute in grain refinement of magnesium. Metall. Mater. Trans. A. 31, 28952906 (2000).CrossRefGoogle Scholar
Liu, C.M., Zhu, X.R., and Zhou, H.T.: Magnesium Alloy Phase Gragh Set, 1st ed. (Central South University Press, Changsha, 2006), p. 13.Google Scholar
Schaffer, J.P., Saxena, A., Antolovich, S.D., Sanders, T.H. Jr., and Waner, S.B.: The Science and Design of Engineering Materials, 1st ed. (The McGraw-Hill Companies, Inc., Taipei, 1999), pp. 770771.Google Scholar
Easton, M. and St John, D.: An analysis of the relationship between grain size, solute content, and the potency and number density of nucleant particles. Metall. Mater. Trans. A. 36, 19111920 (2005).CrossRefGoogle Scholar
Jiang, B., Qiu, D., Zhang, M.X., Ding, P.D., and Gao, L.: A new approach to grain refinement of an Mg–Li–Al cast alloy. J. Alloys Compd. 492, 9598 (2010).CrossRefGoogle Scholar
Zhang, M.X., Kelly, P.M., Qian, M., and Taylor, J.A.: Crystallography of grain refinement in Mg–Al based alloys. Acta Mater. 53, 32613270 (2005).CrossRefGoogle Scholar
Zhang, M.X. and Kelly, P.M.: Crystallographic features of phase transformations in solids. Prog. Mater. Sci. 54, 11011170 (2009).CrossRefGoogle Scholar
Zhang, M.X., Kelly, P.M., Easton, M., and Taylor, J.A.: Crystallographic study of grain refinement in aluminum alloys using the edge-to-edge matching model. Acta Mater. 53, 14271438 (2005).CrossRefGoogle Scholar
Qiu, D., Zhang, M.X., Taylor, J.A., Fu, H.M., and Kelly, P.M.: A novel approach to the mechanism for the grain refining effect of melt superheating of Mg–Al alloys. Acta Mater. 55, 18631871 (2007).CrossRefGoogle Scholar
JCPDS: International Centre for Diffraction Data PCPDFWIN (2002).Google Scholar
Zhang, M.X. and Kelly, P.M.: Crystallography and morphology of Widmanstätten cementite in austenite. Acta Mater. 46, 46174628 (1998).CrossRefGoogle Scholar