评价了2219-CS铝合金FSW和TIG焊接头的力学性能，并采用晶间腐蚀、剥落腐蚀及电化学腐蚀方法对2219-CS铝合金FSW和TIG焊接头进行了整体及分区域腐蚀行为表征，借助光学显微镜和扫描电子显微镜分析了表面腐蚀形貌. 结果表明，搅拌摩擦焊接头焊核区的细晶结构和弥散再分布的沉淀相大幅度提高了其耐腐蚀性能，热影响区中沉淀相回溶及粗化较TIG焊接头热影响区较弱，耐腐蚀性能有一定提高，搅拌摩擦焊接头的高电化学均质性宏观表现为其整体腐蚀速率的显著降低.
Mechanical performances of friction stir welding (FSW) and tungsten inert gas (TIG) welded 2219-CS aluminum alloy joints were evaluated. The macro and micro zone corrosion behaviors were characterized by intergranular corrosion, exfoliation corrosion, and electrochemical corrosion. The morphologies of corroded surfaces were analyzed with the help of optical microscopy and scanning electron microscopy. The results showed that the fine-grain microstructures and homogeneous redispersed precipitates in the weld nugget zone of friction stir welded joints greatly improved their corrosion resistance. The anti-corrosion performances of the heat affected zone of friction stir welded joints were also better than those of the fusion welded joints, which were attributed to the less re-dissolving and coarsening of the precipitates. The higher electrochemical homogeneity of the friction stir welded joints contributed to the significantly reduction in corrosion rate.
[1] 刘观日, 吴迪, 姚重阳, 等. 航天运载器结构先进材料及工艺技术应用与发展展望[J]. 宇航材料工艺, 2021, 51(4): 1 ? 9
Liu Guanri, Wu Di, Yao Chongyang, et al. Application and development of advanced material and process technology in aerospace vehicle structure[J]. Aerospace Materials and Technology, 2021, 51(4): 1 ? 9
[2] 康举, 梁苏莹, 吴爱萍, 等. 2219铝合金搅拌摩擦焊中的局部液化现象及对接头力学性能的影响[J]. 金属学报, 2017, 53(3): 358 ? 368
Kang Ju, Liang Suying, Wu Aiping, et al. Local liquation phenomenon and its effect on mechanical properties of joint in friction stir welded 2219 Al alloy[J]. Acta Metallurgica Sinica, 2017, 53(3): 358 ? 368
[3] 周政, 王国庆, 宋建岭, 等. 2219铝合金不同气氛下TIG焊焊接接头组织性能[J]. 焊接学报, 2018, 39(7): 47 ? 50
Zhou Zheng, Wang Guoqing, Song Jianling, et al. Microstructure and mechanical properties of 2219 aluminum alloys TIG welding welded joints in different shielding gases[J]. Transactions of the China Welding Institution, 2018, 39(7): 47 ? 50
[4] Dkz A, Apwab C, Yue Z, et al. Microstructural evolution and its effect on mechanical properties in different regions of 2219-C10S aluminum alloy TIG-welded joint-science direct[J]. Transactions of Nonferrous Metals Society of China, 2020, 30(10): 2625 ? 2638.
[5] 张满当, 赵运强, 董春林, 等. 铝锂合金机器人搅拌摩擦焊接头组织和性能[J]. 焊接学报, 2021, 42(5): 71 ? 76
Zhang Mandang, Zhao Yunqiang, Dong Chunlin, et al. Structure and properties of friction stir welding joint of Al-Li alloy[J]. Transactions of the China Welding Institution, 2021, 42(5): 71 ? 76
[6] Meng X, Huang Y, Cao J, et al. Recent progress on control strategies for inherent issues in friction stir welding[J]. Progress in Materials Science, 2021, 115: 100706.
[7] Hu Y, Liu H, Du S. Achievement of high-strength 2219 aluminum alloy joint in a broad process window by ultrasonic enhanced friction stir welding[J]. Materials Science & Engineering A, 2021, 804: 140587.
[8] Wei F X, Jin H L. Microstructure and pitting corrosion of friction stir welded joints in 2219-O aluminum alloy thick plate[J]. Corrosion Science, 2009, 51(11): 2743 ? 2751.
[9] 张华, 孙大同, 张贺, 等. 2219铝合金搅拌摩擦焊接头腐蚀行为[J]. 焊接学报, 2014, 35(7): 39 ? 42
Zhang Hua, Sun Datong, Zhang He, et al. Corrosion behavior of friction stir welded 2219 aluminum alloy[J]. Transactions of the China Welding Institution, 2014, 35(7): 39 ? 42
[10] 梁苏莹. 2219铝合金搅拌摩擦焊接头在中性介质中的腐蚀行为[J]. 腐蚀与防护, 2017, 38(3): 208 ? 213
Liang Suying. Corrosion behavior of friction stir welded joints of 2219 Al alloy in neutral chloride solution[J]. Corrosion & Protection, 2017, 38(3): 208 ? 213
[11] 何跃, 郑玉贵, 国旭明. 高强Al-Cu合金2219及其熔敷金属的点蚀行为研究[J]. 腐蚀科学与防护技术, 2005(6): 16 ? 20
He Yue, Zheng Yugui, Guo Xuming. Pitting corrosion of high strength Al-Cu alloy 2219 and its overlayers[J]. Corrosion Science and Protection Technology, 2005(6): 16 ? 20
[12] 章淑芳, 郝云飞, 王晓敏, 等. 2219铝合金焊接接头晶间腐蚀行为[J]. 焊接学报, 2017, 38(4): 22 ? 26
Zhang Shufang, Hao Yunfei, Wang Xiaomin, et al. Intergranular corrosion behavior of 2219 aluminum alloys welding joint[J]. Transactions of the China Welding Institution, 2017, 38(4): 22 ? 26
