HREM and HAADF Studies of Precipitates in the Mg-Y-Nd Alloy System


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By means of high resolution transmission electron microscopy (HREM) and high-angle annular dark-field image technique (HAADF), morphological, structural and compositional characteristics of the precipitates in the Mg-4Y-3Nd alloy aged at 200°C for different periods of time have been studied. On the basis of HREM observations, an atomic structural model for the β’-precipitate with an orthorhombic unit cell has been proposed. The characteristic distribution of the precipitates which are rich in rare-earth elements (Y, Nd) has been clearly revealed by the HAADF imaging technique.



Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

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




W. Sun et al., "HREM and HAADF Studies of Precipitates in the Mg-Y-Nd Alloy System", Materials Science Forum, Vols. 561-565, pp. 275-278, 2007

Online since:

October 2007




[1] J. F. King: Adv. Mat. Tech. Inter. 12 (1990), p.12.

[2] I. J. Polmear Light alloys/ Metallurgy and Materials Science. 3rd ed. (1995).

[3] J. F. Nie and B. C. Muddle: Acta materialia 48(2000), p.1691.

[4] C. Antion, P. Donnadieu, F. Perrard, et al: Acta materialia 51(2003), p.5335.