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Semi-solid slurry preparation, rheo-die casting and rheo-squeeze casting of an AZ91–2Ca–1.5Ce ignition-proof magnesium alloy by gas-bubbling process

Published online by Cambridge University Press:  20 January 2017

Jimei Mao Open the ORCID record for Jimei Mao [Opens in a new window] ,
Wencai Liu ,
Guohua Wu ,
Jianfeng Fan ,
Daqiang Cheng ,
Guangling Wei ,
Liang Zhang ,
Wenjiang Ding  and
Chaoying Xie
Jimei Mao
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Wencai Liu*
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Guohua Wu*
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Jianfeng Fan
Affiliation:
Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
Daqiang Cheng
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Guangling Wei
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Liang Zhang
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Wenjiang Ding
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Chaoying Xie
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
*
a) Address all correspondence to these authors. e-mail: [email protected]
b) e-mail: [email protected]
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Abstract

In present study, the semi-solid slurry of the AZ91–2Ca–1.5Ce alloy was firstly prepared by gas-bubbling processing and then was formed by die casting and squeeze casting, respectively. The influence of processing parameters on microstructure and mechanical properties of the alloy was investigated. The results show that increase of gas-flow rate and appropriate pouring temperature can improve the quality of the semi-solid slurry and change the morphology of primary α-Mg particles to rosette-like shape or roundness. Meanwhile, the addition of calcium and cerium refines the as-cast microstructure and dramatically improves the tensile properties, also the strengthening phase Al4Ce exists around the grain boundary. The peak ultimate tensile strength (UTS), yield strength, and elongation of rheo-die casting AZ91–2Ca–1.5Ce alloy are 202 MPa, 154 MPa, and 2.3%, respectively. Especially, compared with conventional liquid die-casting, the UTS and elongation of rheo-die casting AZ91–2Ca–1.5Ce alloy were improved by 8% and 64%, respectively. Meanwhile, the rheo-die casting alloy also showed higher mechanical properties than rheo-squeeze casting alloy, since the higher speed that die casting provided could induce more compact microstructure and remain the semi-solid characteristic better.

Keywords

AZ91–2Ca–1.5Cesemi-solid slurryrheo-die castingmicrostructuremechanical property
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 3 , 14 February 2017 , pp. 677 - 686
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

REFERENCES

Zhang, H., Li, H.J., Guo, Q.Y., Liu, Y.C., and Yu, L.M.: Hot deformation behavior of Ti–22Al–25Nb alloy by processing maps and kinetic analysis. J. Mater. Res. 31(12), 1764 (2016).CrossRefGoogle Scholar
Liu, W.C., Jiang, L.K., Cao, L., Mei, J., Wu, G.H., Zhang, S., Xiao, L., Wang, S.H., and Ding, W.J.: Fatigue behavior and plane-strain fracture toughness of sand-cast Mg–10Gd–3Y–0.5Zr magnesium alloy. Mater. Des. 59, 466 (2014).CrossRefGoogle Scholar
Jiang, M.G., Yan, H., Gao, L., and Chen, R.S.: Microstructural evolution of Mg–7Al–2Sn Mg alloy during multi-directional impact forging. J. Magnesium Alloys 3, 180 (2015).CrossRefGoogle Scholar
Li, Y.L., Wu, G.H., Chen, A.T., and Jafari Nodooshan, H.R.: Effect of Gd and Zr additions on the microstructure and high-temperature mechanical behavior of Mg–Gd–Y–Zr magnesium alloys in the product form of a large structural casting. J. Mater. Res. 30, 3461 (2015).CrossRefGoogle Scholar
Zhang, J.H., Niu, X.D., Qiu, X., Liu, K., and Nan, C.M.: Effect of yttrium-rich misch metal on the microstructures, mechanical properties and corrosion behavior of die cast AZ91 alloy. J. Alloys Compd. 471, 322 (2009).CrossRefGoogle Scholar
Bakke, P. and Westengen, H.: Die casting for high performance—Focus on alloy development. Adv. Eng. Mater. 5(12), 879 (2003).CrossRefGoogle Scholar
Guo, L.L. and Fujita, F.: Influence of rolling parameters on dynamically recrystallized microstructures in AZ31 magnesium alloy sheets. J. Magnesium Alloys 3, 95 (2015).CrossRefGoogle Scholar
Luo, A.: Recent magnesium alloy development for elevated temperature applications. Int. Mater. Rev. 49, 13 (2004).CrossRefGoogle Scholar
Pettersen, G., Westengen, H., Hoier, R., and Lohne, O.: Microstructure of a pressure die cast magnesium—4 wt% aluminium alloy modified with rare earth additions. Mater. Sci. Eng., A 207(1), 115 (1996).CrossRefGoogle Scholar
Shepeleva, L. and Bamberger, M.: Microstructure of high pressure die cast AZ91D modified with Ca and Ce. Mater. Sci. Eng., A 425(1–2), 312 (2006).CrossRefGoogle Scholar
Song, G.L., Bowles, A.L., and StJohn, D.H.: Corrosion resistance of aged die cast magnesium alloy AZ91D. Mater. Sci. Eng., A 366(1), 74 (2004).CrossRefGoogle Scholar
Wu, Y.P., Zhang, X.M., Deng, Y.L., and Tang, C.P.: Microstructure, texture, and enhanced mechanical properties of an extruded Mg-rare earth alloy after hot compression. J. Mater. Res. 30(24), 3776 (2015).CrossRefGoogle Scholar
Xue, F., Min, X.G., and Sun, Y.S.: Microstructures and mechanical properties of AZ91 alloy with combined additions of Ca and Si. J. Mater. Sci. 41, 4725 (2006).Google Scholar
Zhao, H.L., Guan, S.K., and Zheng, F.Y.: Effects of Sr and B addition on microstructure and mechanical properties of AZ91 magnesium alloy. J. Mater. Res. 22(9), 2423 (2007).CrossRefGoogle Scholar
Yu, J.C., Liu, Z., Dong, Y., and Wang, Z.: Dynamic compressive property and failure behavior of extruded Mg–Gd–Y alloy under high temperatures and high strain rates. J. Magnesium Alloys 3, 134 (2015).CrossRefGoogle Scholar
Wang, J.L., Liao, R.L., Wang, L.D., Wu, Y.M., Cao, Z.Y., and Wang, L.M.: Investigations of the properties of Mg–5Al–0.3Mn–xCe (x = 0–3, wt%) alloys. J. Alloys Compd. 477(1–2), 341 (2009).CrossRefGoogle Scholar
Chen, J.G., Sun, Y., Zhang, J.S., Cheng, W.L., Niu, X.F., and Xu, C.X.: Effects of Ti addition on the microstructure and mechanical properties of Mg–Zn–Zr–Ca alloys. J. Magnesium Alloys 3, 121 (2015).CrossRefGoogle Scholar
Sakamoto, M. and Akiyama, S.: Suppression of ignition and burning of molten Mg alloys by Ca bearing stable oxide film. J. Mater. Sci. Lett. 16, 1048 (1997).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, 1669 (2005).CrossRefGoogle Scholar
Turen, Y.: Effect of Sn addition on microstructure, mechanical and casting properties of AZ91 alloy. Mater. Des. 49, 1009 (2013).CrossRefGoogle Scholar
Shabadi, R., Ambat, R., and Dwarakadasa, E.S.: AZ91C magnesium alloy modified by Cd. Mater. Des. 53, 445 (2014).CrossRefGoogle Scholar
Limmaneevichitr, C., Pongananpanya, S., and Kajornchaiyakul, J.: Metallurgical structure of A356 aluminum alloy solidified under mechanical vibration: An investigation of alternative semi-solid casting routes. Mater. Des. 30, 3925 (2009).CrossRefGoogle Scholar
Taghavi, F., Saghafian, H., and Kharrazi, Y.H.K.: Study on the ability of mechanical vibration for the production of thixotropic microstructure in A356 aluminum alloy. Mater. Des. 30, 115 (2009).CrossRefGoogle Scholar
Wang, C.L., Chen, A.T., Zhang, L., Liu, W.C., Wu, G.H., and Ding, W.J.: Preparation of an Mg–Gd–Zn alloy semisolid slurry by low frequency electro-magnetic stirring. Mater. Des. 84, 53 (2015).CrossRefGoogle Scholar
Wannasin, J., Martinez, R., and Flemings, M.: Grain refinement of an aluminum alloy by introducing gas bubbles during solidification. Scr. Mater. 55, 115 (2006).CrossRefGoogle Scholar
Thanabumrungkul, S., Janudom, S., Burapa, R., Dulyapraphant, P., and Wannasin, J.: Industrial development of gas induced semi-solid process. Trans. Nonferrous Met. Soc. China 20, 1016 (2010).CrossRefGoogle Scholar
Zhang, Y., Wu, G.H., Liu, W.C., Zhang, L., Pang, S., and Ding, W.J.: Effects of processing parameters on microstructure of semi-solid slurry of AZ91D magnesium alloy prepared by gas bubbling. Trans. Nonferrous Met. Soc. China 25, 2181 (2015).CrossRefGoogle Scholar
Deng, Z.H., Li, H.J., Zhao, W.J., and Li, W.B.: Effects of Ce concentrations on ignition temperature and surface tension of Mg–9 wt% Al alloy. China Foundry 10(2), 108 (2013).Google Scholar
Yuan, G.Y., Sun, Y.S., and Ding, W.J.: Effects of Sb addition on the microstructure and mechanical properties of AZ91 magnesium alloy. Scr. Mater. 43, 1009 (2000).Google Scholar
Lin, L., Wang, F., Yang, L., Chen, L.J., Liu, Z., and Wang, Y.M.: Microstructure investigation and first-principle analysis of die-cast AZ91 alloy with calcium addition. Mater. Sci. Eng., A 528, 5283 (2011).CrossRefGoogle Scholar
Ninomiya, R., Ojiro, T., and Kubota, K.: Improved heat resistance of Mg–Al alloys by the Ca addition. Acta Metall. Mater. 43(2), 669 (1995).CrossRefGoogle Scholar
Miyazaki, T., Kaneko, J., and Sugamata, M.: Structures and properties of rapidly solidified Mg–Ca based alloys. Mater. Sci. Eng., A 181–182, 1410 (1994).CrossRefGoogle Scholar
Cai, H.S., Guo, F.F., Ren, X.S., Su, J., and Chen, B.D.: Effects of cerium on as-cast microstructure of AZ91 magnesium alloy under different solidification rates. J. Mater. Process. Technol. 34(7), 736 (2016).Google Scholar
Liu, S.F., Li, B., Wang, X.H., Su, W., and Han, H.: Refinement effect of cerium, calcium and strontium in AZ91 magnesium alloy. J. Mater. Process. Technol. 209, 3999 (2009).CrossRefGoogle Scholar
Xia, K. and Tausig, G.: Liquidus casting of a wrought aluminum alloy 2618 for thixoforming. Mater. Sci. Eng., A 246(1–2), 1 (1998).CrossRefGoogle Scholar