摘要
为了探究玻璃纤维-铝锂合金层板(NFMLs)应用于飞机机身、机翼的重要结构的服役性能,对NFMLs进行70℃/85%RH湿热老化处理,在分别处理1500 h、3000 h后,对NFMLs进行基本力学性能分析。结果表明,固化过程已促进了铝锂合金的时效行为,T1相(直径<20 nm)开始萌生和长大,并作为主要强化相;同时,湿热老化几乎不影响铝锂合金的沉淀行为。在湿热老化样品中未观察到显著的分层现象,但已产生较多微小裂纹。随着湿热老化时间的延长,NFMLs的性能随之下降;但当经过70℃/85%RH,3000 h处理后,NFMLs依然表现出优异的综合性能。
The 70℃/85%RH hygrothermal aging for 1500 h and 3000 h was conducted and the mechanical properties were investigated on glass fiber/aluminum-lithium super hybrid laminates, based on the service condition of aircraft fuselage and wing. The results indicated that small-sized T1 phases（diameter20 nm） generated in the aluminum-lithium layer in the curing process and acted as the major strengthening phase. Meanwhile, the hygrothermal aging hardly affected the precipitation behavior of aluminum-lithium alloy. There was no obvious delamination observed in the hygrothermal aged samples, but numbers of micro cracks generated in the resin matrix. The mechanical properties of NFMLs also decreased with the hygrothermal aging. But the laminates still exhibited excellent properties after 70 ℃/85%RH, 3000 h treatment.
作者
李华冠
华小歌
孙邓辉
陆一
何宏
陶杰
Li Huaguan;Hua Xiaoge;Sun Denghui;Lu Yi;He Hong;Tao Jie(College of Material Engineering, Nanjing Institute of Technology, Nanjing 211167;College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016;Nanjing Fiberglass Research ＆ Design Institute, Nanjing 210012)
出处
《玻璃纤维》
CAS
2018年第2期13-19,共7页
Fiber Glass
基金
江苏省自然科学基金(BK20170762)
中国博士后科学基金(2017M611758)
江苏省轨道交通车辆门系统重点实验室开放课题(KN17-13)
中央高校基本科研业务费专项资金(NZ2013307)
江苏高校优势学科建设工程资助项目
