Research on Welding Process and Joint Microstructure-properties of Bobbin Tool Friction Stir Weld for 2219 Aluminum Alloy

被引：0
|
作者：
Zhang H. [1 ,2 ]
Hao Y. [3 ]
Li G. [1 ,2 ]
Yan X. [3 ]
Yang H. [1 ,2 ]
Zhou L. [1 ,2 ]
机构：
[1] State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin
[2] Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai
[3] Capital Aerospace Machinery Corporation, Beijing
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2022年 / 58卷 / 22期
关键词：
2219 aluminum alloy; bobbin tool friction stir welding; mechanical properties; microstructure;
D O I：
10.3901/JME.2022.22.250
中图分类号：
学科分类号：
摘要：
Bobbin tool friction stir welding of 8 mm thick 2219 aluminum alloy sheets is carried out, and the influence of welding speed on the microstructure and mechanical properties of the welded joints are investigated. The results show that at the rotational rate is 200 r/min, sound joints can be obtained under the various welding speeds. As the welding speed increases, the heat input decreases, so that the size of the recrystallized grains gradually decreases. The hardness change of 2219 aluminum alloy can be attributed to the distribution of precipitates phase particles and the heterogeneity of grains. The lowest hardness zones are located at the heat-affected zones of the joint. With the increase of welding speed, the lowest hardness and tensile strength of the welded joints increase gradually. The welded joints fracture in the boundary of the HAZ and TMAZ. When the welding speed is 350 mm/min, the tensile strength reaches the maximum value of 335 MPa, which corresponds to 72.8% of that of the base metal. © 2022 Editorial Office of Chinese Journal of Mechanical Engineering. All rights reserved.
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页码：250 / 257
页数：7
相关论文
共 23 条
  • [1] HE Hailin, Microstructure and properties of 2219 aluminum alloy large ring and its engineering application, (2019)
  • [2] ANDREAS B, THOMAS G, CHRISTOPH P, Et al., Characterization of the microstructure in friction stir welds of EN AW-2219 using coincident Doppler-broadening spectroscopy[J], Materials Characterization, 149, 1, pp. 143-152, (2019)
  • [3] KANG Ju, LI Jizhao, FANG Zhichao, Et al., Investigation on mechanical and stress corrosion cracking properties of weakness zone in friction stir welded 2219-T8 Al alloy[J], Acta Metallurgica Sinica, 52, 1, pp. 60-70, (2016)
  • [4] HU Y Y, LIU H J, FUJII H., Improving the mechanical properties of 2219-T6 aluminum alloy joints by ultrasonic vibrations during friction stir welding[J], Journal of Materials Processing Tech, 271, 1, pp. 75-84, (2019)
  • [5] MISHRA R S, MA Z Y., Friction stir welding and processing[J], Materials Science and Engineering R, 50, 1, pp. 1-78, (2005)
  • [6] VIVEK P, LI W Y, ACHILLES V, Et al., Recent development in friction stir processing as a solid-state grain refinement technique：Microstructural evolution and property enhancement[J], Critical Reviews in Solid State and Materials Sciences, 44, 5, pp. 378-426, (2019)
  • [7] XUE P, ZHANG X X, WU L H，, Et al., Research process on friction stir welding and processing[J], Acta Metallurgica Sinica, 52, 10, pp. 1222-1238, (2016)
  • [8] CAM G., Friction stir welded structural materials：Beyond Al-alloys[J], International Materials Reviews, 56, 1, pp. 1-48, (2011)
  • [9] GUO Q H, DONG X C, HAO M W，, Et al., Effect of tool probe with a disc at the top on the microstructure and mechanical properties of FSW joints for 6061-T6 aluminum alloy[J], Journal of Adhesion Science and Technology, 33, 22, pp. 2462-2475, (2019)
  • [10] THOMAS W M, WIESNER C S., Recent developments of FSW technologies：Evaluation of root defects，composite refractory tools for steel joining and one-pass welding of thick sections using self-reacting bobbin tools, 8th International Conference on Trends in Welding Research, (2008)
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