Microstructures and mechanical properties of 2014 aluminium alloyforgings made by a new process

来源期刊：中国有色金属学报(英文版)2000年第2期

论文作者：张新明 宋旼 周卓平 曾苏民

文章页码：139 - 143

Key words：2014 aluminium alloy forging; mechanical properties; microstructures

Abstract: 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 (3~6μm)appear in an approximately isometric way, and a large number of 2nd submicrophases(0.05~0.15μm) 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.