Accessible Requires Authentication Published by De Gruyter March 31, 2017

Effects of rare-earth element addition and heat treatment on the microstructures and mechanical properties of Al-25 % Si alloy

Bo Dang, Zengyun Jian and Junfeng Xu

Abstract

The effects of pouring temperature, the content of a rare earth (RE) metal modifier, and T6 heat treatment on the microstructure and mechanical properties of Al-25 % Si alloy were investigated. The results show that for the unmodified alloy, the morphology of primary Si was transformed from coarse polygons and platelets to fine polyhedral, and the average size decreased with increasing pouring temperature. The primary Si exhibited a small blocky morphology with an average size of 47 μm at an optimal content of 1.2 % RE. The tensile strength and elongation were enhanced by the addition of RE followed by the T6 heat treatment, and the maximum tensile strength and elongation (208.3 MPa and 1.01 %) were obtained for the sample modified with 1.2 % RE followed by the T6 heat treatment.


*Correspondence address, Prof. Zengyun Jian, The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices, Xi'an Technological University, Xuefu Middle Road No. 2, Xi'an Shaanxi 710021, P. R. China, Tel.: +86-29-86173323, Fax: +86-29-86173323, E-mail:

References

[1] T.R.Prabhu: Acta Metall. Sin. (Engl. Lett.)28 (2015) 909. 10.1007/s40195-015-0275-z Search in Google Scholar

[2] M.Franco, T.H.Krishna, A.M.Pillai, A.Rajendra, A.K.Sharma: Acta Metall. Sin. (Engl. Lett.)26 (2013) 647. 10.1007/s40195-013-0091-2 Search in Google Scholar

[3] D.Q.Wan: Trans. Nonferrous Met. Soc. China22 (2012) 1051. 10.1016/s1003-6326(11)61282-x Search in Google Scholar

[4] D.Wang, C.S.He, H.Wang, X.Zhao, L.Zuo: Acta. Metall. Sin. (Engl. Lett.)27 (2014) 245. 10.1007/s40195-014-0052-4 Search in Google Scholar

[5] A.M.Samuel, G.H.Garza-Elizondo, H.W.Doty, F.H.Samuel: Mater. Des.80 (2015) 99. 10.1016/j.matdes.2015.05.013 Search in Google Scholar

[6] Q.L.Li, T.D.Xia, Y.F.Lan, P.F.Li, L.Fan: Mater. Sci. Eng.A588 (2013) 97. 10.1016/j.msea.2013.09.017 Search in Google Scholar

[7] W.X.Shi, B.Gao, G.F.Tu, S.W.Li: J. Alloys Compd.508 (2010) 480. 10.1016/j.jallcom.2010.08.098 Search in Google Scholar

[8] W.X.Shi, B.Gao, G.F.Tu, S.W.Li, Y.Hao, F.X.Yu: J. Rare Earths28 (2010) 367. 10.1016/s1002-0721(10)60363-8 Search in Google Scholar

[9] J.Y.Chang, G.H.Kim, I.G.Moon, C.S.Choi: Scr. Mater.39 (1998) 307. 10.1016/s1359-6462(98)00168-7 Search in Google Scholar

[10] W.M.Jiang, Z.T.Fan, Y.C.Dai, C.Li: Mater. Sci. Eng. A597 (2014) 237. 10.1016/j.msea.2014.01.009 Search in Google Scholar

[11] S.A.Al Kahtani, H.W.Doty, F.H.Samuel: Int. J. Cast Metal. Res.27 (2014) 38. 10.1179/1743133613y.0000000077 Search in Google Scholar

[12] P.A.Rometsch, Y.Zhang, S.Knight: Trans. Nonferrous Met. Soc. China24 (2014) 2003. 10.1016/s1003-6326(14)63306-9 Search in Google Scholar

[13] H.M.A.Azmah, C.S.Chang, C.O.Khang: Mater. Des.32 (2011) 2334. 10.1016/j.matdes.2010.12.040 Search in Google Scholar

[14] A.K.Gupta, B.K.Prasad, R.K.Pajnoo, S.Das: Trans. Nonferrous Met. Soc. China22 (2012) 1041. 10.1016/s1003-6326(11)61281-8 Search in Google Scholar

[15] C.W.Liao, J.C.Chen, Y.L.Li, H.Chen, C.X.Pan: Prog. Nat. Sci.-Mater.24 (2014) 87. 10.1016/j.pnsc.2014.03.002 Search in Google Scholar

[16] H.F.C.Robles, M.B.Djurdjevic, W.T.Kierkus, J.H.Sokolowski: Mater. Sci. Eng. A396 (2005) 271. 10.1016/j.msea.2005.01.024 Search in Google Scholar

[17] C.L.Xu, Q.C.Jiang: Mater. Sci. Eng. A437 (2006) 451. 10.1016/j.msea.2006.07.088 Search in Google Scholar

[18] Z.W.Chen, W.Q.Jie, R.J.Zhang: Mater. Lett.59 (2005) 2183. 10.1016/j.matlet.2004.08.047 Search in Google Scholar

[19] M.C.Dahlborg, P.S.Popel, M.J.Kramer, M.Besser, J.R.Morris, U.Dahlborg: J. Alloys Compd.550 (2013) 9. 10.1016/j.jallcom.2012.09.086 Search in Google Scholar

[20] X.R.Liu, Y.D.Zhang, B.Beausir, F.Liu, C.Esling, F.X.Yu: Acta Mater.97 (2015) 338. 10.1016/j.actamat.2015.06.041 Search in Google Scholar

[21] Y.H.Zhang, X.C.Miao, Z.Y.Shen, Q.Y.Han, C.J.Song, Q.J.Zhai: Acta Mater.97 (2015) 357. 10.1016/j.actamat.2015.07.002 Search in Google Scholar

[22] J.H.Li, X.D.Wang, T.H.Ludwig, Y.Teunekawa, L.Arnberg, J.Z.Jiang, P.Schumacher: Acta Mater.84 (2015) 153. 10.1016/j.actamat.2014.10.064 Search in Google Scholar

[23] U.Patakham, J.Kajornchaiyakul, C.Limmaneevichitr: J. Alloys Compd.542 (2012) 177. 10.1016/j.jallcom.2012.07.018 Search in Google Scholar

[24] S.Hedge, K.N.Prabhu: J. Mater. Sci.43 (2008) 3009. 10.1007/s10853-008-2505-5 Search in Google Scholar

[25] D.X.Yang, X.Y.Li, D.Y.He, H.Huang: Mater. Sci. Eng. A561 (2013) 226. 10.1016/j.msea.2012.11.002 Search in Google Scholar

[26] M.F.Kilicaslan, W.R.Lee, T.H.Lee, Y.Sohn, S.J.Hong: Mater. Lett.71 (2012) 164. 10.1016/j.matlet.2011.12.050 Search in Google Scholar

[27] M.F.Kilicaslan: J. Alloys Compd.606 (2014) 86. 10.1016/j.jallcom.2014.04.020 Search in Google Scholar

[28] F.Y.Cao, Y.D.Jia, K.G.Prashanth, P.Ma, J.S.Liu, S.Scudino, F.Huang, J.Eckert, J.F.Sun: Mater. Des.74 (2015) 150. 10.1016/j.matdes.2015.03.008 Search in Google Scholar

[29] D.K.Dwivedi, A.Sharma, T.V.Rajan: Mater. Manuf. Process.20 (2005) 777. 10.1081/amp-200055138 Search in Google Scholar

Received: 2016-11-01
Accepted: 2017-01-10
Published Online: 2017-03-31
Published in Print: 2017-04-13

© 2017, Carl Hanser Verlag, München