航空学报 > 1989, Vol. 10 Issue (11): 588-594

热处理对8090铝锂合金机械性能与显微组织的影响

卢连大, 崔建忠, 马龙翔   

  1. 东北工学院
  • 收稿日期:1988-11-07 修回日期:1900-01-01 出版日期:1989-11-25 发布日期:1989-11-25

EFFECT OF HEAT TREATMENT ON THE MECHANICAL PROPERTIES AND MICROSTRUCTURES OF 8090 ALUMINUM-LITHIUM ALLOY

Lu Lianda, Cui Jianzhong, Ma Longxiang   

  1. Northeast University of Technology
  • Received:1988-11-07 Revised:1900-01-01 Online:1989-11-25 Published:1989-11-25

摘要:

本文考查了一种Al-Li-Cu-Mg-Zr合金经不同沉淀强化工艺后的机械性能、使用透射电镜、扫描电镜考查了不同制度对应的显微组织特征。指出:控制时效温度、时间与预延展变形,可以调整δ′(Al3Li)、S′(Al2CuMg)相的复合沉淀得到优化组合,明显改善合金的强度与塑性。

关键词: Al-Li合金, 机械性能, 显微组织

Abstract:

The mechanical properties and microstructure characteristics of 8090 aluminum-lithium alloy have been investigated extensively by tensile testing, transmission and scanning electron microscopy in different heat treatment cinditions. The results showed that the optimum properties were obtained at 165℃/70-80h in which temper a better matching between δ' and S'precipatates was obtained, and the growth of δ' and δ' (PFZ) was limited.

Key words: Al-Li alloy, mchanical properties, microstructures