Influence of Procedure Parameters on Rheological Property of Semi-Solid AZ91D Magnesium Alloy
来源期刊：JOURNAL OF RARE EARTHS2004年增刊第2期
论文作者：Xie Shuisheng Li Xinggang Jiang Yunxi Li Lei
Key words：AZ91D alloy; semi-solid; rheological property; procedure parameter;
Abstract: Semi-solid AZ91D magnesium alloy was investigated in isothermal steady-state condition. The influence of stirring technological parameters such as stirring temperature and shear rate to apparent viscosity of semi-solid alloy slurry was discussed. Apparent viscosity increases with stirring temperature decreases at the same shear rate. At the same stirring temperature, apparent viscosity decreases rapidly at first with shear rate increases, and then apparent viscosity decreases slowly with shear rate increases, when shear rate reaches a certain value, apparent viscosity appears tiny increase. According to the experimental data, the relation between solid volume fraction and apparent viscosity of semi-solid AZ9l D alloy at shear rate 238 s- 1 is fitted by regression method, it supplies useful data to the numerical simulation of semi-solid AZ91D alloy die casting process.
Xie Shuisheng1，Li Xinggang1，Jiang Yunxi1，Li Lei1
(1.General Research Institute for Non-Ferrous Metals,Beijing 100088,China)
Abstract:Semi-solid AZ91D magnesium alloy was investigated in isothermal steady-state condition. The influence of stirring technological parameters such as stirring temperature and shear rate to apparent viscosity of semi-solid alloy slurry was discussed. Apparent viscosity increases with stirring temperature decreases at the same shear rate. At the same stirring temperature, apparent viscosity decreases rapidly at first with shear rate increases, and then apparent viscosity decreases slowly with shear rate increases, when shear rate reaches a certain value, apparent viscosity appears tiny increase. According to the experimental data, the relation between solid volume fraction and apparent viscosity of semi-solid AZ9l D alloy at shear rate 238 s- 1 is fitted by regression method, it supplies useful data to the numerical simulation of semi-solid AZ91D alloy die casting process.
Key words:AZ91D alloy; semi-solid; rheological property; procedure parameter;
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