铸造2017，Vol.66Issue(12)：1256-1261,6.
稀土Er对铸态Mg-6Al合金显微组织和力学性能的影响
Effect of Er on Microstructure and Mechanical Properties of As-Cast Mg-6Al Magnesium Alloys
摘要
Abstract
The influence of Er addition on microstructural evolution and related mechanical properties of as-cast Mg-6Al (wt. ％) alloys were systematically investigated by using OM, XRD, SEM/EDS and tensile tests. The results show that, the new phase Al3Er phases appeared, and proper amount of Er addition into Mg-6Al alloys resulted in significant enhanced mechanical properties. Besides, the grain size reduced as well as the morphology of second particles changed from continuous or discontinuous net-like to short rod/ granule by Er addition. In addition, the size of the second phases was also refined and its distribution became more uniformly. However, the mechanical properties degraded with more than 1.5％ Er addition. The improved ultimate tensile strength and elongation were attributed to synergic effects of grain refinement strengthening and the second particles strengthening. The proper amount of Er addition is 1.0％, the tensile strength is 181 MPa, elongation is 9.3％. The grain refinement mechanism and effect of Er on second phases in Mg-6Al alloys were also discussed.关键词
镁合金/Er/显微组织/力学性能Key words
magnesium alloy/Erbium/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
崔红卫,张甜甜,余晖,贾秋荣,崔晓丽,陈洪美,翟慎宝,柴韶春,闵光辉..稀土Er对铸态Mg-6Al合金显微组织和力学性能的影响[J].铸造,2017,66(12):1256-1261,6.基金项目
山东理工大学博士科研启动经费资助项目(4041-414014) （4041-414014）
山东省淄博市科技发展计划项目(9001-111088). （9001-111088）
