摘要
利用气氛电阻炉制备了AZ 31-xNd合金(x=0.05%,0.1%,0.2%,0.4%,0.6%),采用光学显微镜(OM)、扫描电子显微镜(SEM)和电子能谱分析仪(EDS)对不同Nd含量的实验合金进行了显微组织观察和分析,结果发现,Nd在AZ 31-xNd合金中形成了Al_3Nd和Mg_(12)Nd相,这些含Nd相导致AZ 31镁合金在凝固过程中的晶粒细化,从而提高了AZ 31镁合金的铸态室温力学性能,随着Nd含量的增加,合金的铸态室温抗拉强度极限和延伸率均先升高后降低.
An AZ 31-xNd alloy was made in an atmosphere resistance furnace（x=0.05%,0.1%,0.2%,0.4%,0.6%）.The microdructure observation and analysis of the alloy with different neodymium content were carried out by optical microscopy（OM）,scanning electron microscopy（SEM） and electron spectroscopy analyzer（EDS）.The experimental results shows that neodymium formes Al_3Nd and Mg_（12）Nd phases in the AZ 31-xNd alloy,causing grain refinement of AZ31 magnesium alloy,thus improving the mechanical properties at the room temperature.The as-cast ultimate strength and elongation first increases and then decreases with increase of neodymium content.
出处
《材料与冶金学报》
CAS
北大核心
2017年第1期53-57,62,共6页
Journal of Materials and Metallurgy
基金
国家重点研发计划"重点基础材料技术提升与产业化"重点专项(编号2016YFB0301104)
关键词
AZ
31镁合金
稀土
第二相
组织
力学性能
AZ 31 magnesium alloy
rare earth
second phase
microstructure
mechanical properties
