摘要
通过显微组织观察与室温拉伸性能测试,研究了电磁搅拌对铸态Mg-6%Zn-0.3%Zr合金的显微组织及拉伸性能的影响。结果表明:随着磁场强度的增大,晶粒尺度明显减小且均匀化,晶粒形状趋于等轴晶,合金的抗拉强度、屈服强度以及伸长率增大。拉伸断口形貌观察表明,重力铸造和电磁搅拌铸造Mg-6%Zn-0.3%Zr合金的断裂方式都是脆性断裂。
By microstructure observation and tensile tests at room temperature, the influences of electromagnetic stirring on the microstructure and tensile properties of as-cast Mg-6%Zn-0.3%Zr alloy were investigated. The results show that with increasing the magnetic field intensity, the grain size apparently reduces and becomes more homogeneous, and the grains tend to be equiaxial. The ultimate tensile strength, yield strength and elongation of the alloy get enhanced. The observation of the morphologies of tensile fracture surfaces reveals that as-cast Mg-6% Zn-0.3% Zr alloys fabricated by gravity casting and electromagnetic stirring exhibit brittle fracture modes.
出处
《热加工工艺》
CSCD
北大核心
2013年第7期49-51,共3页
Hot Working Technology
基金
辽宁省高等学校优秀人才支持计划项目(LR201030)
辽宁省教育厅一般项目(L2012038)
