Microstructures and mechanical properties of Mg-8Al-1Nd-0.5Zn-xSr alloys

摘要：

　　The influence of trace strontium (Sr) addition on the microstructure and mechanical properties of Mg-8Al-1Nd-0.5Zn was investigated with OM,SEM,and XRD etc.The results show that the lamellar eutectics and divorced β-Mg17Al12 were reduced or refined with trace Sr addition.Among the as-cast Mg-8Al-1Nd-0.5Zn -xSr alloys,the Mg-8Al-1Nd-0.5Zn-0.05Sr alloy exhibited the best mechanical properties in which the tensile strength,the yield strength reached to 244.9 MPa and 111.7 MPa respectively.In addition,with the increase of Sr addition,the ductility was improved and it was observed that the number of cleavage steps and secondary cracks decreased on the fracture surfaces of tensile samples.It was also observed that the fractures occurred in the coarse β-Mg17Al12 phase instead of the Mg/Mg17Al12 interface or Al11Nd3 phase.

关键词： Mg-8Al-1Nd-0.5Zn Sr Microstructure Mechanical properties

作者: Baoliang Shi Tianjiao Luo Ruidong Liu Xuguang Dong Jing Wang Yuansheng Yang

作者单位: Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 282-288

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）