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Investigation of semi-solid microstructures of an A356 alloy containing rare-earth Gd during isothermal heat treatment

Yong Hu, Longzhi Zhao, Dejia Liu, Yanchuan Tang and Yongqiang Han


The effects of isothermal heat treatment on microstructures of an A356 alloy containing rare-earth gadolinium (Gd) were investigated to obtain an optimum semi-solid structure. Our results revealed that the primary α-Al phase of the semi-solid A356 alloy containing Gd was significantly refined and that its morphology was spherical or near-spherical. Increases in holding temperature and prolongation of holding time led to an initial decrease in size during the primary α-Al phase, followed by a gradual increase. Solid–liquid interfacial tension resulted in the spheroidization of the primary α-Al phase.

Correspondence address, Associate Professor Yong Hu, School of Materials Science and Engineering, East China Jiaotong University, No. 808, Shuanggang East Road, Nangchang 330013, P.R. China, Tel: +86-13576012078, E-mail:


[1] Z.Fan: Int. Mater. Rev.47 (2002) 49. 10.1179/095066001225001076 Search in Google Scholar

[2] Y.F.Zhang, Y.B.Liu, Z.Y.Cao: Trans. Nonferrous Met. Soc. China21 (2011) 250. 10.1016/S1003-6326(11)60706-1 Search in Google Scholar

[3] Y.Birol: Int. J. Mater. Res.98 (2007) 1019. 10.3139/146.101560 Search in Google Scholar

[4] C.G.Kang, J.H.Yoon, Y.H.Seo: J. Mater. Process. Technol.66 (1997) 30. 10.1016/S0924-0136(96)02493-4 Search in Google Scholar

[5] G.Eisaabadi, A.Nouri: Int. J. Metalcast12 (2018) 292. 10.1007/s40962-017-0161-8 Search in Google Scholar

[6] W.Khalifa, S.El-Hadad, Y.Tsunekawa: Trans. Nonferrous Met. Soc. China25 (2015) 3173. 10.1016/S1003-6326(15)63949-8 Search in Google Scholar

[7] C.W.Lin, F.Y.Hung, T.S.Lui, L.H.Chen: Mater. Sci. Eng. A659 (2016) 143. 10.1016/j.msea.2016.02.041 Search in Google Scholar

[8] Y.Hu, L.Rao, X.W.Ni: China Foundry12 (2015) 20. Search in Google Scholar

[9] Q.Tang, H.Sun, M.Y.Zhou, G.F.Quan: Metals7 (2017) 416. 10.3390/met7100416 Search in Google Scholar

[10] T.J.Chen, Y.Hao, J.Sun, Y.D.Li: Sci. Technol. Adv. Mater.3 (2003) 495. 10.1016/j.stam.2004.01.002 Search in Google Scholar

[11] P.Pandee, U.Patakham, C.Limmaneevichitr: J. Alloys Compd.728 (2017) 844. 10.1016/j.jallcom.2017.09.054 Search in Google Scholar

[12] B.Pourbahari, M.Emamy: Mater. Des.94 (2016) 111. 10.1016/j.matdes.2016.01.039 Search in Google Scholar

[13] S.C.Zhang, J.F.Leng, Z.B.Wang, Q.Wang, Y.W.Shao, X.Y.Teng: Mater. Res. Express5 (2018) 016520. 10.1088/2053-1591/aaa657 Search in Google Scholar

[14] W.M.Ding, 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

[15] Z.M.Shi, Q.Wang, Y.T.Shi, G.Zhao, R.Y.Zhang: J. Rare Earth.33 (2015) 1004. 10.1016/S1002-0721(14)60418-X Search in Google Scholar

[16] M.J.Nayyeri, F.Khomamizadeh: J. Alloys Compd.509 (2011) 1567. 10.1016/j.jallcom.2010.10.147 Search in Google Scholar

[17] Y.D.Li, T.J.Chen, Y.Ma, F.Y.Yan, Y.Hao: The Chinese J. Nonfer. Metals17 (2007) 320. Search in Google Scholar

[18] F.R.Cao, R.G.Guan, L.Q.Chen, Z.Y.Zhao, Y.Ren: The Chinese J. Nonfer. Metals22 (2012) 7. 10.1016/S1003-6326(12)61676-8 Search in Google Scholar

Received: 2018-06-25
Accepted: 2018-11-22
Published Online: 2019-05-17
Published in Print: 2019-05-15

© 2019, Carl Hanser Verlag, München