摘要
利用金相显微镜、图象分析仪、SEM、X射线衍射仪等实验手段,研究了单一稀土钇(Y)对航空用铝合金AlZnMgCu铸态组织和力学性能的影响规律.实验结果表明,少量稀土钇能细化合金的二次枝晶组织,减小共晶化合物尺寸.钇的加入主要和铜(Cu)、硅(Si)等元素结合生成相应的稀土化合物相.研究发现。
The effects of Yttrium on the ascast microstructure and the mechanical properties of the AlZnMgCu alloys have been investigated by means of optical microscope,image analyzer,SEM and Xray diffractometry etc. The experimental results show that both the secondary dendrite arm spacing and the eutectic compound demension can be decreased by adding Yttrium. Yttrium can mainly form some intermetallic compounds with CuAl and some impurities, such as Si.It is found that the impact toughness of AlZnMgCu alloys can be improved efficiently by adding a small amount of yttrium.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
1999年第4期382-385,共4页
Journal of China University of Mining & Technology