Precipitation Behavior Of Cast ZC62 Magnesium Alloy

Acta Metall Sin

2006, Vol. 42

Issue (7): 733-738 DOI:

Research Articles

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Precipitation Behavior Of Cast ZC62 Magnesium Alloy

LI Xiao; LIU Jiangwen; LUO Chengping

College of Mechanical Engineering; South China University of Technology; Guangzhou 510640

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LI Xiao; LIU Jiangwen; LUO Chengping. Precipitation Behavior Of Cast ZC62 Magnesium Alloy. Acta Metall Sin, 2006, 42(7): 733-738 .

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Abstract Microstructural studies had been carried out in the ZC62 magnesium alloys with the as-cast and solution-ageing treated states by means of optical microscopy, X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The microstructure of the as-cast ZC62 magnesium alloys was composed of the Mg matrix and eutectic (Mg+CuMgZn), after solution treatment at 440℃, most nonequilibrium eutectic at the grain boundaries dissolved. The granular CuMgZn phase and a small amount of needle-like Mg(Zn,Cu)2 precipitated within the Mg matrix after ageing treatment at 200℃ for different hours, and the Mg(Zn,Cu)2 phase disappeared with the ageing hour increasing, and transformed into the CuMgZn phase. The formation mechanisum of alloy precipitated phases and their effects on ageing strengthening were also discussed.

Key words: ZC62 magnesium alloys microstructure CuMgZn

Received: 28 September 2005

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