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超声能对铝合金搅拌摩擦焊焊缝成型的影响

杨坤玉 彭彬 袁朝桥 宋佳寅 贺地求

杨坤玉, 彭彬, 袁朝桥, 等 . 超声能对铝合金搅拌摩擦焊焊缝成型的影响[J]. 北京航空航天大学学报, 2020, 46(8): 1437-1443. doi: 10.13700/j.bh.1001-5965.2019.0485
引用本文: 杨坤玉, 彭彬, 袁朝桥, 等 . 超声能对铝合金搅拌摩擦焊焊缝成型的影响[J]. 北京航空航天大学学报, 2020, 46(8): 1437-1443. doi: 10.13700/j.bh.1001-5965.2019.0485
YANG Kunyu, PENG Bin, YUAN Zhaoqiao, et al. Influence of ultrasonic energy on weld formation of friction stir welding of aluminum alloy[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(8): 1437-1443. doi: 10.13700/j.bh.1001-5965.2019.0485(in Chinese)
Citation: YANG Kunyu, PENG Bin, YUAN Zhaoqiao, et al. Influence of ultrasonic energy on weld formation of friction stir welding of aluminum alloy[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(8): 1437-1443. doi: 10.13700/j.bh.1001-5965.2019.0485(in Chinese)

超声能对铝合金搅拌摩擦焊焊缝成型的影响

doi: 10.13700/j.bh.1001-5965.2019.0485
基金项目: 

湖南省自然科学基金委科教联合基金 2018JJ5062

详细信息
    作者简介:

    杨坤玉  女, 博士, 教授。主要研究方向:轻金属的搅拌摩擦焊与超声辅助搅拌摩擦焊、航空金属件焊缝裂纹研究与修复

    通讯作者:

    杨坤玉, E-mail:yangkunyumail@163.com

  • 中图分类号: TG453.9

Influence of ultrasonic energy on weld formation of friction stir welding of aluminum alloy

Funds: 

Hunan Provincial Natural Science Foundation Committee Science and Education Joint Fund Project of China 2018JJ5062

More Information
  • 摘要:

    为了探究超声能对铝合金搅拌摩擦焊(FSW)焊缝成型及焊缝缺陷的影响机理,采用数值模拟和试验验证相结合的方法,设计了同等工艺条件下的超声辅助搅拌摩擦焊(UAFSW)与搅拌摩擦焊的流场仿真和试验对比。通过分析2种焊缝横截面上热塑性金属的流动矢量和金相组织,研究了超声能导入后焊缝热塑性金属的流动变化情况。分析结果表明:超声能导入,使铝合金搅拌摩擦焊焊缝内金属的水平绕流方式演变成倾斜绕流方式,并使上下2个独立流场实现交汇统一,而且使焊缝金属最低流速提升近一个数量级,焊缝成型完整度明显增强,焊缝缺陷率大幅降低。

     

  • 图 1  搅拌头与焊件接触几何模型

    Figure 1.  Geometric model of contact betweenmixing head and weldment

    图 2  FSW与UAFSW过程整体流动迹线图对比[17]

    Figure 2.  Comparison of overall flow trace between FSW and UAFSW processes[17]

    图 3  5×10-6s时刻搅拌头表面材料瞬时流动矢量对比

    Figure 3.  Comparison of instantaneous flow vector of surfacematerial of mixing head at 5×10-6s

    图 4  2×10-4s时刻搅拌头表面材料瞬时流动矢量对比

    Figure 4.  Comparison of instantaneous flow vector of surface material of mixing head at 2×10-4s

    图 5  3×10-4s时刻UAFSW搅拌头前后材料瞬时流动矢量

    Figure 5.  Material instantaneous flow vector distribution before and behind UAFSW tool at 3×10-4s

    图 6  表面贴铜箔的焊件

    Figure 6.  Weldment with copper foil on the surface

    图 7  FSW焊缝横截面金相图

    Figure 7.  FSW weld cross-section metallographic

    图 8  UAFSW焊缝横截面金相图

    Figure 8.  UAFSW weld cross-section metallographic

    图 9  工艺窗口外FSW焊缝与UAFSW焊缝成型对比

    Figure 9.  Comparison of weld formation outside processwindow between FSW and UAFSW

    图 10  同等条件下FSW与UAFSW焊缝横截面金相对比

    Figure 10.  Comparison of metallographic weld cross-section between FSW and UAFSW under thesame process conditions

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出版历程
  • 收稿日期:  2019-09-06
  • 录用日期:  2019-09-20
  • 刊出日期:  2020-08-20

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