摘要
利用渗流铸造法分别制备了体积分数约为5%、10%的Ni60-Nb40非晶条带增强的AZ91镁合金复合材料,通过光学显微镜和扫描电镜观察了复合材料的结构和压缩时的断口形貌。结果发现:Ni60-Nb40非晶条带与AZ91镁合金界面润湿性状况较差,有部分分离现象。压缩试验表明:复合材料的屈服强度较AZ91镁合金屈服强度提高,但提高的幅度随着条带体积分数的增加而降低。材料的破坏方式也随条带数量的变化而变化,从应力-应变曲线和断口形貌等方面分析了材料的力学性能及其影响因素。
The composites of AZ91 magnesium alloy reinforced by Ni60Nb40 amorphous ribbon have been fabricated by melt infiltrating casting method. The volume fraction of Ni60-Nb40 is about 5%, 10% respectively. An optical microscopy and a scanning electronic microscopy were used to investigate the structure of the composite and the microscopic morphologies of the fracture surface. The results show that the wetting behavior between Ni60-Nb40 amorphous ribbon and AZ91 magnesium alloy was beyond our expectation. The compression results show that the yielding strength of the composites is higher than that of the AZ91 magnesium alloy, but the extent of which is decreased with the increasing reinforcement. In the same time, the fracture modes varies for the Mg alloy with and without reinforcement, which was discussed according to stress-strain curves and fracture surface.
出处
《铸造》
EI
CAS
CSCD
北大核心
2005年第12期1227-1230,共4页
Foundry
基金
辽宁省教育厅攻关项目(编号:202063289)。
关键词
非晶条带
复合材料
界面
力学性能
amorphous ribbon
composites
wetting behavior
mechanical properties
