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搅拌针偏置对SR-FSW焊缝界面残留缺陷及接头力学性能的影响

郝云飞, 毕煌圣, 淡婷, 郝志斌, 王国庆

郝云飞, 毕煌圣, 淡婷, 郝志斌, 王国庆. 搅拌针偏置对SR-FSW焊缝界面残留缺陷及接头力学性能的影响[J]. 焊接学报, 2019, 40(5): 30-35. DOI: 10.12073/j.hjxb.2019400123
引用本文: 郝云飞, 毕煌圣, 淡婷, 郝志斌, 王国庆. 搅拌针偏置对SR-FSW焊缝界面残留缺陷及接头力学性能的影响[J]. 焊接学报, 2019, 40(5): 30-35. DOI: 10.12073/j.hjxb.2019400123
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HAO Yunfei, BI Huangsheng, DAN Ting, HAO Zhibin, WANG Guoqing. Influence of pin tool offset on the unconsumed interface and mechanical properties of the self-reacting friction stir welded joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(5): 30-35. DOI: 10.12073/j.hjxb.2019400123
Citation: HAO Yunfei, BI Huangsheng, DAN Ting, HAO Zhibin, WANG Guoqing. Influence of pin tool offset on the unconsumed interface and mechanical properties of the self-reacting friction stir welded joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(5): 30-35. DOI: 10.12073/j.hjxb.2019400123
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搅拌针偏置对SR-FSW焊缝界面残留缺陷及接头力学性能的影响

  • 1.

    首都航天机械有限公司, 北京 100076

  • 2.

    中国运载火箭技术研究院, 北京 100076

基金项目: 十三五装备预研共用技术课题资助项目（41423050128）

Influence of pin tool offset on the unconsumed interface and mechanical properties of the self-reacting friction stir welded joints

  • 1.

    Capital Aerospace Machinery Company, Beijing 100076, China

  • 2.

    China Academy of Launch Vehicle Technology, Beijing 100076, China

摘要

    摘要
  • 摘要: 系统研究了搅拌针偏置对双轴肩搅拌摩擦焊接头内部质量及接头性能的影响. 接头组织形貌结果表明，接头焊核区由存在层状结构的3个区域和不带任何趋势性分布的1个楔状区域组成. 当搅拌针偏置使接头原始装配界面置于接头后退侧塑性金属流动不充分的楔状区域时，将会产生一种特有的界面残留缺陷. 接头力学性能结果表明，随着搅拌针偏置从−6 mm变至−3 mm时，接头拉伸性能逐渐升高，均断裂于界面残留缺陷处；当搅拌针偏置处于{−2 mm，+ 5 mm}范围内时，接头性能达到最优，接头抗拉强度达到340 ~ 350 MPa，接头均断裂于后退侧热力影响区. 而当偏置进入 + 6 mm时，接头性能开始下降.
    Abstract: The effects of pin tool offset on the internal quality and mechanical properties of the SR-FSWed joints was systematically studied. The results show that the nugget zone of the joint consisted of three layered structure areas and a wedge area without any trend distribution. A peculiar remaining defect at the interface occurred when the joint interface was located in the wedge area of the nugget zone at certain pin too offset. Mechanical properties results show that the tensile properties of the joints increased gradually with the pin offset from –6 mm to –3 mm, and all the joints were broken at the unconsumed interface defects. When the pin tool offset ranges from –2 mm to + 5 mm, the performance of the joints was optimal with the tensile strength 340 ~ 350 MPa, and the joints was all broken at the RS-TMAZ location. The performance of the joint started to decrease with + 6 mm pin offset.
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    • 参考文献(14)
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  • 收稿日期:  2018-08-27

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