HRTEM Observation of Precipitates in Mg-Gd-Zr and Mg-Y-Zr Alloys Aged at 423 K

Tokimasa Kawabata; Kenji Matsuda; Susumu Ikeno

doi:10.4028/www.scientific.net/MSF.706-709.1205

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HomeMaterials Science ForumMaterials Science Forum Vols. 706-709HRTEM Observation of Precipitates in Mg-Gd-Zr and...

HRTEM Observation of Precipitates in Mg-Gd-Zr and Mg-Y-Zr Alloys Aged at 423 K

Abstract:

High resolution transmission electron microscopy (HRTEM) observation was performed to clarify the early stage of precipitation in Mg-Gd (-Zr) alloy and Mg-Y(-Zr) alloy aged at 423 K. At the early stage of agigng at 423 K, the intensity of the diffuse spots become higher at the 1/2 distance of 1100 or 2110 corresponding to magnesium matrix spots with aging time. Contrasts of mono layers on {100}_Mg planes, and the feature of D0₁₉ type structure, precipitates with five layers corresponding the feature of (020)_b'plane and b' phase co-existed and b' phase formed predominantly in the peak aged Mg-Gd (-Zr) alloy at 423 K, wheres in the peak aged Mg-Y(-Zr) alloy at 423 K, monolayer and precursor of precipitates with five layers corresponding the feature of (020)_b'plane formed predominantly.

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Periodical:

Materials Science Forum (Volumes 706-709)

Pages:

1205-1208

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.706-709.1205

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Online since:

January 2012

Authors:

Tokimasa Kawabata, Kenji Matsuda, Susumu Ikeno

Keywords:

Aging, High Resolution Transmission Electron Microscopy, Magnesium-Rare Earth Alloy, Precipitate

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