摘要
The influence of trace Er addition on high pure aluminum was studied by mechanical properties measurement,hardness measurement, optical microscope,transmission electron microscope and energy spectrum analysis. The results show that minor Er in the studied alloy exists in the form of Al 3Er,only a few of Er in α Al based solid solution .Primary Al 3Er particles formed during solidification were often found at the center of aluminum grains and acted as heterogeneous nucleus, also increased the rate of nucleation, therefore the grain are remarkably refined. Trace Er addition to high pure aluminum is able to increase the mechanical properties of high pure Al, which is caused by fine grain strengthening, substructure strengthening and precipitation strengthening. The recrystallization temperature of Er doped aluminum increases above 50 ℃, which is caused by the pinning effect of highly dispersed fine Al 3Er precipitates on dislocations and sub grain boundaries.
The influence of trace Er addition on high pure aluminum was studied by mechanical properties measurement,hardness measurement, optical microscope,transmission electron microscope and energy spectrum analysis. The results show that minor Er in the studied alloy exists in the form of Al 3Er,only a few of Er in α Al based solid solution .Primary Al 3Er particles formed during solidification were often found at the center of aluminum grains and acted as heterogeneous nucleus, also increased the rate of nucleation, therefore the grain are remarkably refined. Trace Er addition to high pure aluminum is able to increase the mechanical properties of high pure Al, which is caused by fine grain strengthening, substructure strengthening and precipitation strengthening. The recrystallization temperature of Er doped aluminum increases above 50 ℃, which is caused by the pinning effect of highly dispersed fine Al 3Er precipitates on dislocations and sub grain boundaries.
出处
《中国有色金属学会会刊:英文版》
CSCD
2003年第5期1035-1039,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(G19990 64 90 7)supportedbytheNationalPriorityDevelopmentforAlFundamentalResearchofChina
关键词
稀土元素
铒
机械性能
再结晶
高纯铝
痕迹
rare earth element Er
mechanical properties
recrystallization
Al 3Er