|Table of Contents|

Microstructure and effects of mechanical properties of 2219 aluminum alloy welded joint


Research Field:
Publishing date:


Microstructure and effects of mechanical properties of 2219 aluminum alloy welded joint
Xue CaijunXu JiangboLiang HengZhang JunmiaoLin Hongzhi
State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
2219 aluminum alloywelding jointsmicrostructuresmechanism propertiestungsten inert gas arc welding
Microstructure and mechanism properties of 2219-T87 aluminum alloy TIG weld joint with 10 mm thickness are studied.The test results show that the average yield strength of the weld seam is 49.3%,the tensile strength is 67.8% and the elongation after the fracture is 65.4% of the base metal.Tensile fractures are observed from the micrograms.Microhardness is the highest in the weld zone and the lowest on the fusion line and in the heat influenced zone.The hardness of the whole plate is lower than that of the base metal after welding.The corrosion test shows that the corrosion of the weld zone is better than that of the base metal.The research revults show that the performance of 2219 aluminum alloy welding can be improved by meliorating the welding process which can decrease the formation of the fusion zone and heatinfluenced zone,and solving the problems of CuAl2 segregation,etc.


[1]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,2005,17(6):387-391. He Yue,Zheng Yugui,Guo Xuming.Pitting corrosion of high strength Al-Cu Alloy 2219 and its overlayers[J].Corrosion Science and Protection Technology,2005,17(6):387-391.
[2]孟庆国,方洪渊,徐文立,等.2219铝合金双丝焊热影响区组织及力学性能[J].焊接学报,2006,27(3):9-12. Meng Qingguo,Fang Hongyuan,Xu Wenli,et al.Microstructure and mechanical properties of 2219 Alalloy heataffected zone with twin wire welding[J].Transactions of the China Welding Institution,2006,27(3):9-12.
[3]Lü Shixiong,Song Jianling,Wang Haitao,et al.Temperature field and flow field during tungsten inert gas bead welding of copper alloy onto steel[J].Materials Science and Engineering A,2009,49:347-351.
[4]王洪峰,左敦稳,王宏宇,等.5554铝合金TIG焊缝组织与性能[J].南京航空航天大学学报,2010,42(6):752-757. Wang Hongfeng,Zuo Dunwen,Wang Hongyu,et al.Microstructure and mechanical properties of 5554 aluminum alloy TIGWelded seam[J].Journal of Nanjing University of Aeronautics and Astronautics,2010,42(6):752-757.
[5]王春炎,曲文卿,姚君山,等.2219-T87铝合金搅拌摩擦焊接头组织与力学性能[J].焊接学报,2010,31(10):77-84. Wang Chunyan,Qu Wenqing,Yao Junshan,et al.Microstructures and mechanical properties of friction stir welded 2219-T87 aluminum alloy joints[J].Transactions of the China Welding Institution,2010,31(10):77-84.
[6]从保强,齐铂金,周兴国,等.2219高强铝合金超快变换VPTIG焊缝组织和性能[J].焊接学报,2010,31(4):85-88. Cong Baoqiang,Qi Bojing,Zhou Xingguo,et al.Microstructure and mechanical properties of ultrafast convert VPTIG arc welding of 2219 high strength aluminum alloy[J].Transactions of the China Welding Institution,2010,31(4):85-88.
[7]王良模,陈玉发,王晨至,等.铝合金车轮弯曲疲劳寿命的仿真分析与试验研究[J].南京理工大学学报,2009,33(5):571-575. Wang Liangmo,Chen Yufa,Wang Chenzhi,et al.Simulation and test on aluminum alloy wheel rotary fatigue life[J].Journal of Nanjing University of Science and Technology,2009,33(5):571-575.


Last Update: 2013-02-15