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MA Qingna, SHAO Fei, BAI Linyue, XU Qian. Study on corrosion fatigue properties and fracture characteristics of 7075 aluminum alloy FSW joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(6): 72-77. DOI: 10.12073/j.hjxb.20200320001
Citation: MA Qingna, SHAO Fei, BAI Linyue, XU Qian. Study on corrosion fatigue properties and fracture characteristics of 7075 aluminum alloy FSW joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(6): 72-77. DOI: 10.12073/j.hjxb.20200320001
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Study on corrosion fatigue properties and fracture characteristics of 7075 aluminum alloy FSW joint

  • Army Engineering University of PLA, Nanjing, 210037, China

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  • Received Date: March 19, 2020
  • Available Online: September 26, 2020
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    • Abstract
  • Taking 7075-T6 aluminum alloy friction stir welding joint as the research object, the microstructure, 3.5 wt % NaCl solution corrosion fatigue life and corrosion fatigue fracture characteristics were studied, and the corrosion fatigue performance and fracture process of 7075 aluminum alloy friction stir welding joint were analyzed. The results showed that: the S-N curve equation of corrosion fatigue of 7075-T6 aluminum alloy friction stir welded joint is lgN=5.845-0.014S, With the increasing of stress amplitude, the corrosion fatigue life decreased greatly. The corrosion fatigue crack originated in the thermal affected zone of the joint, gradually expanded and finally broke in the welded core zone of the joint. There were multiple crack sources in the corrosion fatigue fracture, and with the influence of stress concentration, the crack source originated in the corrosion pit. The high stress aggravated the corrosion damage of the corner part of the sample, led to more serious corrosion than that of the plane position. Obvious intergranular fracture and fatigue striation appeared in the crack growth zone. Under the combined action of corrosive medium and alternating load, the crack growth zone suffered the most serious corrosion, and the anodic dissolution occurred at the grain boundary, resulting in the morphology characteristics of “rock candy” and “ant nest”. Instantaneous fault zone was brittle fault,and there were a lot of cleavage steps and secondary cracks in this zone, the pore morphology appeared in the second phase particle distribution region.
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  • 张坤, 方远方, 栾国红, 等. 静止轴肩搅拌摩擦焊接6005铝合金的力学和疲劳性能[J]. 焊接学报, 2017, 38(10): 25 − 29.

    Zhang Kun, Fang Yuanfang, Luan Guohong, et al. Mechanical and fatigue property of stationary shoulder friction stir welding AA6005[J]. Transactions of the China Welding Institution, 2017, 38(10): 25 − 29.
    Rodriguez R I, Jordon J B, Allison P G, et al. Low-cycle fatigue of dissimilar friction stir welded aluminum alloys[J]. Materials Science & Engineering A, 2016, 654: 236 − 248.
    邓彩艳, 高仁, 龚宝明, 等. 7050铝合金搅拌摩擦焊接头超高周疲劳性能[J]. 焊接学报, 2017, 39(11): 114 − 118.

    Deng Caiyan, Gao Ren, Gong Baoming, et al. Research onultrahighcycle fatigue properties of 7050 aluminum alloy FSW welded joints[J]. Transactions of the China Welding Institution, 2017, 39(11): 114 − 118.
    赵熠朋, 朱浩, 姜月, 等. 7075铝合金搅拌摩擦焊接头断裂机理[J]. 焊接学报, 2017, 38(11): 78 − 82.

    Zhao Yipeng, Zhu Hao, Jiang Yue, et al. Fracture mechanism of 7075 aluminum alloy friction stir joint[J]. Transactions of the China Welding Institution, 2017, 38(11): 78 − 82.
    Sun Guoqin, Wang Chongwen, Wei Xinhai, et al. Study on small fatigue crack initiation and growth for friction stir welded joints[J]. Materials Science & Engineering A, 2019, 739: 71 − 85.
    Abubakr Kraedegh,Aleksandar Sedmak, Aleksandar Grbovic, et al. Stringer effect on fatigue crack propagation in A2024-T351 aluminum alloy welded joints[J]. International Journal of Fatigue, 2017(105): 276 − 282.
    Guo Shihui, Shah Luqman, Ranjan Rakesh, et al. Effect of quality control parameter variations on the fatigue performance of aluminum friction stir welded joints[J]. International Journal of Fatigue, 2019, 118: 150 − 161.
    Lumsden J B, Mahoney M W, Rhodes C G, et al. Corrosion behavior of friction-stir-welded AA7050-T7651[J]. Corrosion, 2003, 59(3): 212 − 219. doi: 10.5006/1.3277553
    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.
    Li Yajie, Qin Fengming, Liu Cuirong, et al. Flow law, microstructure and corrosion behavior of friction stir welded 5A06 alloy[J]. Rare Metal Materials and Engineering, 2018, 47(8): 2353 − 2359. doi: 10.1016/S1875-5372(18)30191-7
    张华, 崔冰, 林三宝, 等. 7050铝合金搅拌摩擦焊接头腐蚀行为分析[J]. 焊接学报, 2018, 39(7): 71 − 74.

    Zhang Hua, Cui Bing, Lin Sanbao, et al. Corrosion behavior of friction stir welded Joints of 7050 aluminum alloy[J]. Transactions of the China Welding Institution, 2018, 39(7): 71 − 74.
    Sun Guoqin, Wang Chongwen, Wei Xinhai, et al. Study on small fatigue crack initiation and growth for friction stir welded joints[J]. Materials Science & Engineering A, 2019(739): 71-85.
    Pedro Atz Dick, Gerhard H.Knörnschild, Luís F.P.Dick. Anodising and corrosion resistance of AA 7050 friction stir welds[J]. Corrosion Science, 2017, 114: 028 − 036.
    谢利, 王江涛, 卢雅琳, 等. 双轴肩搅拌摩擦焊对7075铝合金组织和性能的影响[J]. 电焊机, 2019, 49(2): 55 − 59.

    Xie Li, Wang Jiangtao, Lu Yalin, et al. Microstructure and properties of bobbin-tool FSW for the 7075 aluminum alloy[J]. Electric Welding Machine, 2019, 49(2): 55 − 59.
    Rodriguez R I, Jordon J B, Allison P G, et al. Corrosion effects on fatigue behavior of dissimilar friction stir welding of highstrength aluminum alloys[J]. Materials Science & Engineering A, 2019, 742: 255 − 268.
    李旭东, 穆志韬, 苏维国, 等. 6A02铝合金腐蚀疲劳断口分析[J]. 青岛科技大学学报(自然科学版), 2013, 34(3): 285 − 289.

    Li Xudong, Mu Zhitao, Su Weiguo, et al. Corrosion fatigue fracture analysis of 6A02 aluminm alloy[J]. Journal of Qingdao University of Science and Technology (Natural Science Edition), 2013, 34(3): 285 − 289.
    Hatamleh Omar, Preet M Singh, Hamid Garmestani. Stress corrosion cracking behavior of peened friction stir welded 2195 aluminum alloy Joints[J]. Journal of Materials Engineering and Performance, 2009, 18(4): 406 − 413. doi: 10.1007/s11665-008-9303-8
    刘德强. 7075铝合金厚板搅拌摩擦焊接头腐蚀行为研究[D]. 南昌: 南昌航空大学, 2016.

    Liu Deqiang. Investigation of the corrosion behavior of fric-tion stir welded joints in 20 mm thick 7075 aluminum alloy[D]. Nanchang: Nanchang Hangkong University, 2016.
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