HRTEM Observation of Precipitates at Early Stage of Aging in Mg-Gd-Zr Alloy


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High resolution transmission electron microscopy(HRTEM)observation was performed to clarify morphology of precipitates at early stage of aging in Mg-Gd-Zr alloy. In the specimen aged at 423K, monolayer was observed on {1100}Mg planes. With increasing aging time, the monolayer and β” phase grew along the <1120>Mg directions. Arrangement of bright dots corresponding to {020}β’ except for the monolayer and β” phase was observed before peak aging stage. β’ phases formed at the same aging stage. Thus, these precipitates co-existed before peak aging stage. The monolayer, β” phase and β’ phase still co-existed in the peak aged specimen. The β’ phase was dominated in the peak hardness. It is revealed that the monolayer lying on {1100}Mg act as precursor of β” phase and β’ phase.



Materials Science Forum (Volumes 561-565)

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Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee




T. Kawabata et al., "HRTEM Observation of Precipitates at Early Stage of Aging in Mg-Gd-Zr Alloy", Materials Science Forum, Vols. 561-565, pp. 303-306, 2007

Online since:

October 2007




[1] P. Vostry, B. SMOLA, I. STULIKOVA, F. VON BUCH and B.L. MORDIKE, phy. stat. sol. (a) 175 (1999), 491.


[2] X. Gao, S. M. He, X. Q. Zeng, L. M. Peng, W. J. Ding, J.F. Nie, Materials Science and Engineering A, 431 (2006) 162-167.

[3] T. Kawabata, K. Matsuda, S. Kamado, Y. Kojima and S. Ikeno, J. Japan Institute of Metals, 10 (2006), 828-834.

[4] T. Kawabata, Y. Fukuda, K. Matsuda, Y. Kojima and S. Ikeno, Materials Transactions, (2006), . 954-959.

[5] C. Antion, P. Donnadieu, F. Perrard, A. Deschamps, C. Tassin and A. Pisch, Acta Materialia 51 (2003) 5335-5348.


[6] S. M. He, X. Q. Zheng, L. M. Peng, X. Gao, J. F. Nie and W. J. Ding, Journal of Alloys and Compounds, 421 (2006) 309-313.

[7] T. Honma et al, Material Science and Engineering A, 395 (2005) 301-306.

[8] Nie J. F. and Muddle B. C. Scripta Mater, 40 (1999) 1089-1094.

[9] J. F. Nie and B. C. Muddle, Acta mater, 48 (2000) 1691-1703.

[10] Lorimer G, Azari-Khosroshaki R, Ahmed M: Proc. Int. conf. on Solid-Solid Phase Transformations, (The Jpn. Inst. Metals, 1999) pp.185-192.

[11] P. J. Apps, H. Karimzadeh, J. F. King, G. W. Lorimer, Scripta materialia, 48 (2003) 1023-1028.

[12] T. Sato, Isao Takahashi, Hiroyasu Tezuka and Akihiko Kamio: J. Inst. of Light metals, (1992).

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