(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: 研究了预变形对Al-Cu-Mg合金463 K人工时效行为的影响。结果表明，预变形可以提高合金的峰值硬度，合金峰值硬度的增加来自于S 相数目的增加和尺寸的减小；并且由于预变形产生的位错可以作为空位的陷阱，减少了GP区沉淀析出的数量，因此预变形减少了合金在第1阶段的硬化效果。
关键字: Al-Cu-Mg合金； 预变形； 空位
Al-Cu-Mg alloy aged at 463 K
（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 University of Science and Technology, Tai′an 271019, P.R.China）
Abstract:The effect of pre-deformation on the microstructures of Al-3.75%Cu-2.02%Mg (mass fraction) alloy was studied. The results show that the peak hardness of pre-deformation sample is increased because of quantity increase and refinement of S phase. Moreover, because the dislocation generated by pre-deformation can act as the traps for vacancies, the number of GP zones is reduced for pre-deformation sample and hardening effect of the first stage is reduced.
Key words: Al-Cu-Mg alloy; pre-deformation; vacancy
