(1.北京航空航天大学 材料科学与工程系， 北京 100083；
2. 山东科技大学 材料科学与工程系， 泰安 271019)
摘 要: 研究了Al-Zn-Li-Mg-Cu-Zr合金在393 K，433 K和473 K时效过程中δ′相的长大规律，发现当合金在393 K时效时，δ′相的长大符合LSW长大规律；当合金在433*#K和473*#K时效时，δ′相半径的3次方与时效时间符合抛物线关系，这与在此温度下沉淀析出 X 相有关。
关键字: Al-Zn-Li-Mg-Cu-Zr合金; δ′相; LSW规律
（1. Department of Materials Science and Engineering,
Beijing University of Aeronautics and Astronautics, Beijing 100083, P.R.China;
2. Department of Materials Science and Engineering,
Shangdong Unviersity of Science and Technology, Tai′an 271019, P.R.China）
Abstract:The growth ofδ′phase in a Al-Zn-Li-Mg-Cu-Zr alloy aged at 393 K, 433 K and 473 K was investigated. The results show that the growth of δ′phase obeys the LSW law when aged at 393 K. δ′particle size cubed against aging time shows a parabolic relationship when aged at 433 K and 473 K, which is related with the precipitation of X phase.
Key words: Al-Zn-Li-Mg-Cu-Zr alloy; δ′phase; LSW law
