Abstract: In order to research the modification effect of fine-grained Mg-Ce master alloy on AZ91D, fine-grained Mg-Ce master alloy was prepared by copper mold inject casting and the influence of it on the microstructure and properties of AZ91D alloy was investigated. Results showed that the size of Mg12Ce phase in fine-grained Mg-Ce master alloy was reduced from 50 μm to 10 μm, which indicated the fine-grained Mg-Ce master alloy had been refined dramatically. The modification effect of fine-grained Mg-Ce master alloy was better than that of coarse-grained Mg-Ce master alloy. Compared with AZ91D modified by coarse-grained Mg-Ce master alloy, the tensile strength, elongation rate and Brinell hardness of AZ91D modified by fine-grained Mg-Ce master alloy increased by 5.23%, 15.14% and 6.92% respectively, and the corrosion rate decreased by 44.62%. Therefore, copper mold inject casting is an effective way to improve the modification effect of Mg-Ce master alloy.
董天顺, 王拓, 郑晓东, 周秀锴, 刘金海, 李国禄, 崔春翔. 细晶Mg-Ce中间合金的制备及其对AZ91D组织和性能的影响*[J]. 《材料导报》期刊社, 2017, 31(12): 73-78.
DONG Tianshun, WANG Tuo, ZHENG Xiaodong, ZHOU Xiukai, LIU Jinhai, LI Guolu, CUI Chunxiang. Preparation of Fine-grained Mg-Ce Master Alloy and Its Effect on Microstructure and Properties of AZ91D. Materials Reports, 2017, 31(12): 73-78.
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2017, Vol. 31 
