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Preparation of semisolid Mg–Gd–Zn alloy slurry by low frequency electro-magnetic stirring

 

论文名称

Preparation of semisolid Mg–Gd–Zn alloy slurry by low frequency electro-magnetic stirring

发表期刊名称

Materials and Design

简介

The effects of low frequency electromagnetic stirring (LFEMS) including applied voltage, rotational frequency and cooling rate on the microstructure of semisolid slurry of the Mg–2.5Gd–1Zn (at.%) alloy have been investigated. The applied voltage, rotational frequency and cooling rate all have a remarkable influence on the microstructures of the slurries. The LFEMS treatment leads to the morphology of primary Mg particles evolved from dendritic to non-dendritic. The increase of applied voltage leads to refined primary Mg particles, while the increase in rotational frequency makes the α-Mg particles initially refined and then coarsened. The decrease of cooling rate also leads to refinement of primary Mg particles. The optimal processing parameters for the fabrication of semisolid slurry are found to be: applied voltage 300–350 V, rotational frequency 15–20 Hz and cooling rate below 1.4 K/min. Under the optimized parameters, fine and spherical primary Mg particles were obtained, and the average particle size is refined from ~ 680 to ~ 150 μm.

图片

发表时间

20151

影响因子

3.501

完成人

Cunlong Wang, Antao Chen, Liang Zhang, Wencai Liu, Guohua Wu, Wenjiang Ding

联系人

吴国华

电话

13671800698

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