摘要
采用微观组织观察与力学和晶间性能测试相结合的实验方法,研究预变形处理(预轧制和预拉伸)对Al-Cu-Li合金后续峰值时效态合金的微观组织、力学性能以及腐蚀行为的影响。结果表明:时效前进行预变形处理能够促进合金晶粒内部析出大量均匀细小呈弥散分布的T_(1)相,减少晶界上析出相数量,提升合金综合力学性能;析出相能够平衡合金晶界和晶粒内部的电位差,降低合金的晶间腐蚀敏感性,减小腐蚀速率,增强合金抗晶间腐蚀性能。
The effects of pre-rolling and pre-stretching deformation on microstructure,mechanical properties and corrosion behavior of Al-Cu-Li alloy in subsequent peak-aging were investigated by means of microstructure observation with mechanical and intergranular properties tests.The test results show that the pre-deformation treatment before aging promotes the precipitation of a large number of uniform and fine T_(1) phase with dispersed distribution in the alloy grain,and reduces the number of precipitates on the grain boundary,so as to improve the comprehensive mechanical properties of the alloy.In addition,this precipitate microstructure can balance the potential difference between the grain boundary and the grain interior,reduce the intergranular corrosion sensitivity of the alloy,reduce the corrosion rate and enhance the intergranular corrosion resistance of the alloy.
作者
都昌兵
肖锎
官瑞春
彭静
唐启东
徐进军
DU Changbing;XIAO Kai;GUAN Ruichun;PENG Jing;TANG Qidong;XU Jinjun(Aviation Electromechanical Equipment Maintenance Department,Airforce Aviation Repair Institute of Technology College,Changsha 410124,China;China Machinery International Engineering Design&Research Institute Co.,Ltd.,Changsha 410124,China;Compressor Unit Maintenance Center,National Pipe Network Group North Pipeline Co.,Ltd.,Langfang 065000,Hebei,China;Hunan Aircraft Maintenance Engineering Technology Research Center,Changsha 410124,China)
出处
《航空材料学报》
CAS
CSCD
北大核心
2022年第3期28-37,共10页
Journal of Aeronautical Materials
基金
湖南省自然科学基金科教联合项目(2020JJ7077)
湖南省教育厅科学研究项目优秀青年项目(21B0929)。
