脉冲磁场下原位Mg<sub>2</sub>Si/Mg-7Al复合材料的组织与性能

邓鹏; 郑旺旺; 邓鸣瑶; 胡颖; 史周琨; 张磊

doi:10.15980/j.tzzz.2017.01.025

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脉冲磁场下原位Mg₂Si/Mg-7Al复合材料的组织与性能
Microstructure and Mechanical Properties of In-situ Mg₂Si/Mg-7Al Composites under a Pulsed Magnetic Field
2017年37卷第1期页码：94-96
纸质出版日期： 2017 ，
DOI： 10.15980/j.tzzz.2017.01.025

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[1]邓鹏,郑旺旺,邓鸣瑶,胡颖,史周琨,张磊.脉冲磁场下原位Mg_2Si/Mg-7Al复合材料的组织与性能[J].特种铸造及有色合金,2017,37(01):94-96.

Deng Peng, Zheng Wangwang, Deng Mingyao, et al. Microstructure and Mechanical Properties of In-situ Mg₂Si/Mg-7Al Composites under a Pulsed Magnetic Field[J]. Special Casting & Nonferrous Alloys, 2017,37(1):94-96.
[1]邓鹏,郑旺旺,邓鸣瑶,胡颖,史周琨,张磊.脉冲磁场下原位Mg_2Si/Mg-7Al复合材料的组织与性能[J].特种铸造及有色合金,2017,37(01):94-96. DOI： 10.15980/j.tzzz.2017.01.025.

Deng Peng, Zheng Wangwang, Deng Mingyao, et al. Microstructure and Mechanical Properties of In-situ Mg₂Si/Mg-7Al Composites under a Pulsed Magnetic Field[J]. Special Casting & Nonferrous Alloys, 2017,37(1):94-96. DOI： 10.15980/j.tzzz.2017.01.025.

摘要

在原位Mg

Si/Mg-7Al复合材料的凝固过程施加脉冲磁场

研究了放电电压对复合材料组织和力学性能的影响。结果表明

随着放电电压增加

复合材料中的初生Mg

Si相变得细小

其形貌由等轴枝晶状逐渐转变为颗粒状。β-Mg

相由不连续网状逐步转变为孤岛状和颗粒状共存

分布变得更加均匀。随着放电电压的增加

复合材料的抗拉强度和伸长率均逐渐提高。当放电电压为300 V时

复合材料的抗拉强度和伸长率较未处理的复合材料分别提升了37.3%和137.5%。

Abstract

Effects of pulsed magnetic field（PMF）on the solidified microstructure and mechanical properties of in situ Mg

Si/Mg-7Al composites were investigated.Experimental results show that

with increasing in discharging voltage

the Mg

Si phase in the composites prepared is further refined

and the morphology of Mg

Si phase is transformed from equiaxed dendritic to particle-like structure

and the morphology ofβ-Mg17Al12 is converted from discontinuous net-like structure to island-like and particlelike ones with more uniform distribution.The mechanical properties of the composites treated by PMF were improved significantly.The tensile strength and elongation of the composites treated by PMF at300 Vare increased by 37.3% and 137.5%

respectively

compared with those of the composites untreated by PMF.