Advanced Search
LUO Chuanhong, GUO Lijie, DONG Fengbo, ZHANG Jianqiang, PENG Weiping. Analysis of turbulent flowing zone in friction stir welded aluminum alloy weld nugget[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(1): 90-94.
Citation: LUO Chuanhong, GUO Lijie, DONG Fengbo, ZHANG Jianqiang, PENG Weiping. Analysis of turbulent flowing zone in friction stir welded aluminum alloy weld nugget[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(1): 90-94.

Analysis of turbulent flowing zone in friction stir welded aluminum alloy weld nugget

More Information
  • Received Date: March 23, 2015
  • A 2219-T6 aluminum alloy plate was welded by friction stir welding, and the morphology, microstructure and mechanical properties of the joint were investigated correspondingly. Through analyzing the flowing pattern of the plastically deformed metal in the nugget zone, the strength weakening of the joint were analyzed and summarized. The results show that the welded nugget is divided into three different regions according to the flowing pattern of plastic metal, and a turbulent flowing region is produced by unbalanced suction and extrusion of plastic metal at the front side of joint. This region with weak mechanical properties is a channel for the back flow of plastic metal. The weakening strength is due to the plastic deformation induced damage of the metal, which resulted in the formation of defects and the mutational interface. Moreover, grains in the turbulent flowing region presented large thermal instability. After the recrystallization heat treatment, the joint can restore the ductility, which will improve the mechanical properties of the joint.
  • Murr L E, Liu G,MeClure J C. Dynamic recrystallization in friction stir welding of aluminum alloy1100[J]. Journal of Materials Science Letters, 1997, 16(22): 1801-1806.
    Rhodnev C G, Mahonev M V, Bingel W H, et al. Effect of friction stir welding on mierostrueture of 7075 aluminum[J]. Seripta Materialia, 1997, 37(1): 69-73.
    贺地求, 邓 航, 周鹏展. 2219厚板拌摩擦焊组织及性能分析[J]. 焊接学报, 2007, 28(9): 13-16. He Diqiu, Deng Hang, Zhou Pengzhan. Analysis of microstructure and properties in friction-stir welding of 2219 thick plate[J]. Transactions of the China Welding Institution, 2008, 28(9): 13-16.
    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): 77-80. 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): 77-80.
    徐忠峰, 陆 皓, 余 春, 等. 2219铝合金双主轴回抽式搅拌摩擦焊接头组织与力学性能分析[J]. 焊接学报, 2013, 34(3): 73-76. Xu Zhongfeng, Lu Hao, Yu Chun, et al. Microstructure and mechanical properties of 2219 aluminum alloy refilling friction stir welded joints[J]. Transactions of the China Welding Institution, 2013, 34(3): 73-76.
    吴鸿燕, 刑 丽, 陈玉华, 等. 2219铝合金搅拌摩擦焊接头的断裂部位特征[J]. 金属热处理, 2011, 36(5): 90-93. Wu Hongyan, Xing Li, Chen Yuhua, et al. Fracture location characteristics of 2219 alum inum alloy friction stir welded joints[J].Heat Treatment of metals, 2011, 36(5): 90-93.
    柯黎明, 潘际銮, 邢 丽, 等. 搅拌摩擦焊焊缝金属塑性流动的抽吸-挤压理论[J]. 机械工程学报, 2009, 45(4): 89-94. Ke Liming, Pan Jiluan, Xing Li, et al. Sucking-extruding theory for the material flow in friction stir welds[J]. Journal of Mechanical Engineering, 2009, 45(4): 89-94.
    罗传红, 彭卫平, 张建强, 等. 焊后热处理对2219-T6铝合金搅拌摩擦焊接头力学性能的影响[J]. 材料热处理学报, 2015, 36(3): 35-39. Luo Chuanhong, Peng Weiping, Zhang Jianqiang, et al. Effect of post weld heat treatment on mechanical properties of friction stir welded joints for 2219-T6 aluminum alloy[J]. Transactions of Materials and Heat Treatment, 2015, 36(3): 35-39.
  • Related Articles

    [1]ZHANG Gang, HUANG Jiankang, SHI Yu, FAN Ding, LU Lihui, FAN Jiawei. Pulsed current parameters based control of aluminum alloy pulsed MIG welding process[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (12): 59-62.
    [2]ZHANG Xiaoli, LI Yuzhen, LONG Peng, XUE Jiaxiang. Pulsed MIG welding of aluminum alloy sheet based on fuzzy self-tuning PID control[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (11): 83-87.
    [3]LÜ Yan, TIAN Xincheng, LIANG Jun. Decoupling control design and simulation of aluminum alloy pulsed MIG welding based on dynamic PLS framework[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (6): 17-20.
    [4]LU Lihui, FAN Ding, HUANG Jiankang, ZHU Ming, SHI Yu. Study on arc length control system for pulsed MIG welding of aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2011, (9): 53-56.
    [5]PENG Haiyan, HUANG Shisheng, WU Kaiyuan, WANG Zhenmin. Digital control system based on DSP for pulsed MIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2008, (9): 63-66.
    [6]SHI Yu, XUE Cheng, FAN Ding, LI Jianjun. Modeling and simulation of decoupling control system of aluminum pulsed MIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2008, (5): 9-12.
    [7]WANG fang, HOU Wen-kao, HU S Jack. Research on simulation systems of MIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2003, (1): 35-39.
    [8]Zhang Jiaying, Jiang Lipei, Zhang Xianghong. Fuzzy Control System for MIG Weld Pool Width[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1999, (1): 63-69.
    [9]Chen Shanben, Wu Lin, Wang Qilong, Liu Yuchi. A Fuzzy Inference-neural Network Control of Dynamic Process of Weld Bead Width in Pulse TIG Welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1997, (3): 159-165.
    [10]Yin Shuyan, Gang Tie, Bu Huaquan. Microcumputer control system of synergic pulsed MIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1991, (1): 46-52.

Catalog

    Article views (717) PDF downloads (796) Cited by()

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return