铸造2017，Vol.66Issue(3)：242-245,4.
稀土Gd对Mg-5Zn-0.6Zr镁合金铸态组织与力学性能的影响
Effect of Rare Earth Gd on Microstructure and Mechanical Properties of As-Cast Mg-5Zn-0.6Zr Magnesium Alloy
摘要
Abstract
The effect of rare earth Gd on microstructure and mechanical properties of as-cast Mg-5Zn-0.6Zr magnesium alloy was investigated by using optical microscope,scanning electron microscope,mechanical property test.The results show that as-cast microstructure of the Mg-5Zn-0.6Zr alloy consists ofα-Mg grains and MgZn2 phase.The coarse mesh MgZn2 phases were refined in the Mg-5Zn-0.6Zr alloy modified with rare earth Gd element.When the alloy was modified with 1.0 wt.％ Gd,the ultimate strength and elongation reached to the maximum value and are 223 MPa and 7.6％,respectively.The improvement of mechanical properties of as-cast Mg-5Zn-0.6Zr magnesium alloy was attributed to the refinement of coarse MgZn2 phase and the formation of MgZnGd intermetallic compounds with the size of 2-5 μm,which could effectively hinder dislocation motion in the modified alloy.关键词
Mg-5Zn-0.6Zr合金/稀土/Gd/显微组织/力学性能Key words
Mg-5Zn-0.6Zr magnesium alloy/rare earth/Gd/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
章继涛..稀土Gd对Mg-5Zn-0.6Zr镁合金铸态组织与力学性能的影响[J].铸造,2017,66(3):242-245,4.基金项目
江西省教育厅科学技术研究项目. （）
