航空材料学报2013，Vol.33Issue(2)：19-23,5.DOI:10.3969/j.issn.1005-5053.2013.2.004
应力对7050铝合金时效成形组织和性能的影响
Effect of Stress on Microstructure and Mechanical Properties during Age Forming Process of 7050 Aluminum Alloy
摘要
Abstract
Under the normal ageing and stress ageing condition, the effects of external stress on the ageing precipitation behavior of pre-aged 7050 aluminum alloy were studied by micro-hardness and transmission electron microscopy ( TEM). The results show that the external stress during ageing accelerates the age-hardening process of pre-aged 7050 aluminum alloy, and decreases the hardness of peak ageing and shortens the time of under aged stage. The external stress enhances the precipitation behavior and increases the precipitation growth. The TEM observation shows that the property changes of the alloy during stress ageing process are closely related to the evolution of microstructure. In the early stage of stress ageing process, the precipitation of Η' makes the increase of hardness to peak value. Then, the transition of η'to η and the coarsening of η lead to the decrease of hardness.关键词
7050铝合金/应力时效/时效成形/微观组织Key words
7050 aluminum alloy/ stress ageing/ age forming/ microstructure分类
矿业与冶金引用本文复制引用
李超,戴圣龙,张坤,汝继刚..应力对7050铝合金时效成形组织和性能的影响[J].航空材料学报,2013,33(2):19-23,5.
