摘要
The triangular 2014 aluminium alloy forgings were made by a new process and the traditional process. The results showed that the mechanical properties of the forgings made by the new process are far higher than that in the standard of GB223 84, and also higher than that in the standard of EL/53MI 94; moreover, the mechanical properties are almost the same in each direction, and anisotropies are very small. The grains and 2nd phases were analyzed by using TEM and SEM, the results indicate that very fine grains (3～6 μm)appear in an approximately isometric way, and a large number of 2nd submicrophases(0.05～0.15 μm) disappear in no apparently preferred orientation distribution because the new process involves multidirectional heavy plastic deformation (λ=12), solution(500 ℃/400 min) and ageing(165 ℃/10 h) heat treatments for a long time at high temperatures. These refined grains, 2nd submicrophases and their almost homogeneous distribution can make it possible for the forgings to display high mechanical properties.
The triangular 2014 aluminium alloy forgings were made by a new process and the traditional process. The results showed that the mechanical properties of the forgings made by the new process are far higher than that in the standard of GB223-84, and also higher than that in the standard of EL/53MI-94; moreover, the mechanical properties are almost the same in each direction, and anisotropies are very small. The grains and 2nd phases were analyzed by using TEM and SEM, the results indicate that very fine grains (3 similar to 6 mu m)appear in an approximately isometric way, and a large number of 2nd submicrophases(0.05 similar to 0.15 mu m) disappear in no apparently preferred orientation distribution because the new process involves multidirectional heavy plastic deformation (lambda = 12), solution(500 degrees C/400 min) and ageing(165 degrees C/10 h) heat treatments for a long time at high temperatures. These refined grains, 2nd submicrophases and their almost homogeneous distribution can make it possible for the forgings to display high mechanical properties.
出处
《中国有色金属学会会刊：英文版》
CSCD
2000年第2期139-143,共5页
Transactions of Nonferrous Metals Society of China
基金
NationalPriorityDevelopmentProjectforAlFundamentalResearch
