HRTEM Observation of the Precipitates in Heat-Resistant Mg-Gd-Y-Zr Alloy

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The high resolution transmission electron microscope (HRTEM) observation was carried out to investigate the microstructure of precipitates in Mg-Gd-Y-Zr alloy. In the early stage of aging at 423K, monoatomic layers were observed along the (1 1 00)Mg plane. After 64h aging at 423K, the contrast of β” phase based on ordered D019 hexagonal super lattice structure was appeared. The monoatomic layers, two layers spaced by (1 1 00) Mg planes and β’ phase based on bco-structure were observed in the specimen aged for 128h. In the peak- aged specimen, the β’ phase and monoatomic layers were observed.

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Periodical:

Materials Science Forum (Volumes 539-543)

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Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

1769-1774

Citation:

T. Kawabata et al., "HRTEM Observation of the Precipitates in Heat-Resistant Mg-Gd-Y-Zr Alloy", Materials Science Forum, Vols. 539-543, pp. 1769-1774, 2007

Online since:

March 2007

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