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Study on Microstructure of Semi-Solid Magnesium Alloy Manufactured by Gas Bubbles Stirring

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Abstract:

The semi-solid slurry of AZ31 magnesium alloy was manufactured by gas bubbles stirring. The effects of stirring temperature and stirring time on the microstructure of semi-solid slurry were researched. The results indicate that it is feasible to manufacture the slurry with particle-like primary phases. When the stirring temperature is higher, the morphology of the primary a-Mg presents rosette-like morphology and the size of grain is coarse, and the morphology mainly was α- Mg dendrite at lower stirring temperature. Long stirring time could reduce dendrites and liquid phase, and made the non-dendritic grains well spheroidized. But the effects of longer stirring on shape and size of primary particles are not significant. The optimal process parameters for ideal semi-solid slurry manufactured were stired 3min at 645°C.

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Periodical:

Advanced Materials Research (Volumes 129-131)

Pages:

728-732

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.129-131.728

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Online since:

August 2010

Authors:

Jiqiang Li, Lei Zhang, Xuan Pu Dong, Wen Liu, Zhao Zhang

Keywords:

Magnesium, Microstructure, Semi-Solid Slurry, Stirring Temperature, Stirring Time

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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