Study on the Erbium Strengthened Aluminum Alloy


Article Preview

We have systemically studied the effect of the erbium on the microstructure and the mechanical properties in the 5xxx series aluminum alloys by using optical microscope, transmission electron microscope (TEM) and by tensile testing. The results demonstrate that the tensile strength increased quickly at the beginning of small contents of 0.1%Er both in the hot and cold rolled states, then slowly increased with increasing the contents of Er until 0.4%, at which the best balance of the strength and ductility (438MPa and 9.6%) were obtained. Microstructure observation in the hot rolled state was indicated that the grain structure in the Er free Al-5Mg alloy revealed fully recrystallized grain structure, while in the Al-5Mg containing Er was demonstrated deformation structure, indicating the Er addition delayed the recrystallization behavior by the formation of the precipitation of the Al3Er, which confirmed by means of the X-ray diffraction analysis. Furthermore in the TEM microstructure observation the precipitation of Al3Er was distributed both in the grain interior and subgrain or grain boundaries, which could be pinning the subgrain or grain boundary migration and dislocation movement as well. Consequently the beginning of the recrystallization temperature in the Al-5Mg containing Er was elevated about 50°C than in Al-5Mg without Er. This could be explained that the strength increased without the deterioration of the ductility was attributed to the microstructure refinement by the Er addition.



Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.




Z. R. Nie et al., "Study on the Erbium Strengthened Aluminum Alloy", Materials Science Forum, Vols. 546-549, pp. 623-628, 2007

Online since:

May 2007




[1] L. M. Angers, Y. C. Chen, M. E. Fine, J. R. Weertman, M. S. Zedalis, in: E. A. Starke, T. H. Sanders (Eds. ), Aluminum Alloys: Their Physical and Mechanical Properties, Vol. 1. EMAS, Warley (1986) 321-322.

[2] Z. R. Nie, T. Jin, J. B. Fu, . Xu, J. Yang, J. Zhou, T, Zuo, Materials Science Forum 1-3 (2002) Vol. l, 396-402 1731.

[3] M. E. Fine, in: Y. W. Kim, W. M. Griffith (Eds. ), Dispersion Strengthen Aluminum Alloys. TMS (1988)103.

[4] J. Royset, N. Ryum : Int. Mater. Rev. 50(2005)19.

[5] Z. R. Nie, J. B. Fu, T.N. Jun, J.X. Zhou, J.J. Yang, G.F. Xu, H.Q. Ruan, T.Y. Zuo in: J.F. Nie, A.J. Morton, B.C. Muddle(Eds. ), Aluminium Alloys - Their Physical and Mechanical Properties Vol. 28. Tnstitute of Materials Engineering Australasia(2004).

[6] M. S. Zedalis, M. E. Fine: Metall, Trans. A 17(1986)2186.

[7] R. E. Lewis, D. D. Crooks, Y. C. Chen, M. E. Fine, J. R. Weertman, in: B. Wilshire, R. W. Evans (Eds. ), Proc. 3rd Int. Conf on Creep and Fracture of Engineering Materials and Structures. The Institute of Metals, London (1987) 331.

[8] Z.R. Nie, J.B. Fu, T.N. Jin, J.X. Zhou, J.J. Yang, T,Y. Zuo: Trans. Nonferrous Met. Soc, China 13(2003)509.

[9] Yang Junjun, Nie Zuoren, Jin Tounan, et al, Trans. of Nonf. Met. Sci. of China, 2003. 13(5): 1035-1039.

[10] Yang Junjun, Nie Zuoren, Jin Tounan, et al, The Chinese Journal of Nonferrous Metals, Vol. 14 (2004)(1): 620-626.

[11] Xu Guofu, Nie Zuoren, Jin Tounan, et al, J. Chinese Rare Earth. 2002, 20(2): 143-145.

[12] K.L. Kendig , D.B. Miracle, Acta Materialia, 2002, 50: 4165-4175.

[13] Yu Shengwen, Wang Wei, Xu He, Liu Li, Nie Zuoren, The Chinese Journal of Nonferrous Metals, Vol. 16 (2006)(3): 505-510.

[14] S.J. Savage, F.H. Froes, D. Eliezer, in: Metall. Trans. A18(1987)1533.

[15] S. J. Savage, F. H. Froes, D. Eliezer, in: P. W. Lee, R. S. Carbonara (Eds. ). Rapidly Solidified Materials. ASM, Metals Park (1986) 351.

[16] H. Okamoto: Phase Diagrams for Binary Alloys. ASM International, Materials Park (2000).

[17] T. B. Massalski (Eds. ): Binary Alloy Phase Diagrams, Vol. 1, 2nd ed. ASM International, Materials Park (1990)88-189.

[18] T.B. Massalski, Binary Alloy phase Diagrams, Vol. 1., 2nd. ed., ASM International, Materials Park, (1990).

[19] K.E. Knipling, D.C. Dunand, D.N. Seidman, Z. Metallkd., Vol. 97. No. 3, 2006: 246-265.

[20] A. Ruder, D. Eliezer, Israel J. Tech., Vol. 24, 1988: 149.

[21] A. Ruder, D. Eliezer, J. Mater. Sci., Vol. 25, 1990: 3541.

[22] Nie Zuoren�Jin Tounan, Zou Jingxia, Fu Jingbo, Yang Junjun, Zuo Tieyong� Trans. Nonferrous Met. Soc. China, Vol. 13, No. 3, 2003: 509-514.

[23] Yang Junjun, Nie Zuoren, Jin Tounan, et al., Trans Nonferrous Met Soc China, Vol. 13, N0. 5, 2003: 1035-1039.

[24] Toropova L.S., Bykov Yu G., Lazorenko V., et al, Physics of Metals and Metallography, Vol. 54, N0. 1, 1982: 189-191.

[25] Toropova L. S., Eskin D. G., Khara M. L., et al., Advanced aluminum alloys containing scandium- structure and properties, Moscow: Gordon and Brench Science Press, 1998: 23-46.

[26] Xu Guofu, Nie Zuoren, Jin Tounan, Yang Junjun, Fu Jingbo, Yin Zhimin, J. of the Chinese Rare Earth Society, Vol. 20, No. 2, 2002: 143-145�.

[27] Yang Junjun, Nie Zuoren, Jin Tounan, Ruan Haiqiong, Zuo Tieyong, The Chinese Journal of Nonferrous Metals, Vol. 14, No. 4, 2004: 620-626.

[28] Mao Jianwei, Jin Tounan, Xu Guofu, Nie Zuoren, Trans. Nonferrous Met. Soc. China, Vol. 15, No. 6, 2005: 1341-1345.