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《Foundry Technology》 2015-09
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Non-dendritic Microstructure Evolution of Mg-Zn-Zr-x Nd Alloy

HUANG Xiaofeng;SU Jipeng;BI Guangli;QIN Mulan;ZHANG Yu;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology;  
The Mg-Zn-Zr alloys with different content of Nd were observed by optical microscopy, SEM and EDS. The existence form and influence mechanism of Nb element on microstructure and properties were explored. And the effects of Nb content on non-dendritic structure of Mg-Zn-Zr alloy were studied using isothermal heat treatment method. The results show that the Nd element can refine Mg-6Zn-0.9Zr alloy cast microstructure, and the Mg41Nd5 phase appears in the alloy adding Nd elements. With the increase of Nd content, the solid particle size of the alloys gradually decreases. The roundness is significantly improved, and the solid fraction is significantly reduced. Non-dendritic structures mainly consist of primary spherical solid particles, eutectic structure at grain boundaries and parcels between primary particles.
【Fund】: 国家自然科学基金(51464032)
【CateGory Index】: TG146.22
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