MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Morphologies of Microstructure in Mg97Zn1Y2 Ribbon upon Ageing at Different Temperatures
Baishu WangYongbing LiuJian AnRongguang LiZhenguo SuGuihua SuYou LuZhanyi Cao
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JOURNAL FREE ACCESS

2008 Volume 49 Issue 8 Pages 1768-1774

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Abstract

In order to clarify the morphology of the rapidly-solidified (RS)/melt-spun Mg97Zn1Y2 (at%) alloy, which has the secondary phases of long-period stacking (LPS) structure, the ribbon was processed with the thickness of 60 μm and the width of 7 mm, and aged (T5 heat-treated) at different temperatures. The as-spun and aged ribbons were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD) and laser optical microscopy, and micro-hardness measurement were conducted. It is found that there was a cellular/dendritic transition during melt-spinning process of Mg97Zn1Y2 alloy, and a mild age strengthening with the hardness of 113HV/0.05 at 573 K; more importantly, there was a different evolution of morphologies of the matrix and inter-metallic compounds from general secondary phase strengthened alloys when age temperatures up to the 773 K had been introduced to the as-spun alloy.

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© 2008 The Japan Institute of Metals and Materials
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