摘要
为了研究钛合金螺接复合材料件的热带海洋环境腐蚀/老化效应,设计并制备钛合金螺栓连接复合材料模拟件,依托永兴岛大气试验站,开展钛合金螺栓连接复合材料模拟件海洋大气户外暴露试验,收集了2年的环境腐蚀/老化数据,主要包括宏微观形貌、成分变化及力学性能等。研究结果表明:①钛合金螺栓连接复合材料模拟件在户外暴露6个月后,螺栓和螺母表面涂层均发生明显腐蚀;暴露2年后,螺栓表面离子镀铝层脱落导致其严重变色,螺母表面MoS2涂层发生明显腐蚀,复合材料层合板表面出现明显老化,局部出现纤维剥落;②在力学性能方面,经自然环境暴露2年后,连接件承载能力无明显变化,断裂方式均为螺栓钉头弯曲破坏,连接件韧性出现明显下降,断裂时最大位移较初始状态相比下降约16%。
In order to study tropical marine atmospheric environment effects on the Titanium alloy bolted composite joint,Simulation samples were designed and prepared,and outdoor exposure test of bolted titanium alloy composite joints were carried out based on the Yongxing Island atmospheric station.Two years of corrosion/aging data including macro/micro morphology,composition and mechanical properties were collected.The results show that:(1)the surface coatings of bolts and nuts were corroded after 6 months of outdoor exposure.After 2 years of exposure,the ion aluminization layer on the bolt surface fell off,resulting in serious discoloration,obvious corrosion of Mos2 coating on the nut surface was observed,the composite laminates with local fiber spalling occurred due to the natural aging.(2)In terms of mechanical properties,after 2 years exposure in the natural environment,the bearing capacity of the joints did not change significantly,and the fracture mode was all bending failure of the bolt head.The toughness of the joints decreased significantly,and the maximum displacement at the time of fracture decreased byabout 16%compared withtheinitial state.
作者
陈荻云
王才菀
张少锋
CHEN Di-yun;WANG Cai-wan;ZHANG Shao-feng(The 5th Electronics Research Institute of the Ministry of Industry and Information Technology of China,Guangzhou 511370;Guangdong Provincial Key Laboratory of Electronic Information Products Reliability Technology,Guangzhou 511370)
出处
《环境技术》
2023年第10期61-67,共7页
Environmental Technology
关键词
钛合金螺栓连接复合材料
热带海洋大气
环境效应
腐蚀分析
titanium alloy bolted composite joint
tropical ocean atmosphere
environmental effects
corrosion analysis
