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徐良, 李康宁, 杨海锋, 宋坤林, 谷世伟. 微织构特征对铝合金-CFRTP激光焊接头力学性能的影响[J]. 焊接学报, 2024, 45(2): 75-81. DOI: 10.12073/j.hjxb.20230915001
引用本文: 徐良, 李康宁, 杨海锋, 宋坤林, 谷世伟. 微织构特征对铝合金-CFRTP激光焊接头力学性能的影响[J]. 焊接学报, 2024, 45(2): 75-81. DOI: 10.12073/j.hjxb.20230915001
XU Liang, LI Kangning, YANG Haifeng, SONG Kunlin, GU Shiwei. Effect of microtexturing characteristics on the performance of laser welded aluminum alloy-CFRTP joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2024, 45(2): 75-81. DOI: 10.12073/j.hjxb.20230915001
Citation: XU Liang, LI Kangning, YANG Haifeng, SONG Kunlin, GU Shiwei. Effect of microtexturing characteristics on the performance of laser welded aluminum alloy-CFRTP joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2024, 45(2): 75-81. DOI: 10.12073/j.hjxb.20230915001

微织构特征对铝合金-CFRTP激光焊接头力学性能的影响

Effect of microtexturing characteristics on the performance of laser welded aluminum alloy-CFRTP joints

  • 摘要: 该文研究了激光毛化微织构特征对铝合金-CFRTP激光焊接接头性能的影响,分析了激光毛化微织构的作用机理. 结果表明,利用激光毛化技术可以在铝合金表面构建微织构,获得成形良好且性能优异的铝合金-CFRTP激光焊接搭接接头,接头处形成了有效的异种材料紧密嵌合. 随着激光毛化微织构深宽比的增大,熔融CFRTP在铝合金表面微织构中由全部填充转变为部分填充,接头拉伸剪切性能呈现先增大后减小的趋势,接头失效机制呈现“混合断裂(粘附断裂 + 内聚断裂)-CFRTP母材断裂-混合断裂”的变化. 当深宽比达到1.2 ~ 1.6时接头拉伸剪切性能值最大,此时断裂位置位于CFRTP母材. 激光毛化微织构对铝合金-CFRTP接头强化机理为增强CFRTP在铝合金表面的机械嵌合作用,以及激光毛化微织构产生飞溅的“钉扎”作用.

     

    Abstract: The effect of laser texturing on the performance of aluminium alloy-CFRTP laser welded joints was studied and the strengthening mechanism of laser texturing was analyzed. The results showed that the laser surfi-sculpt could be used to build texturing on the surface of aluminium alloys to obtain well-formed and high performance aluminium alloy-CFRTP laser welded lap joints, and the joint achieved tightly embedding. With the increasing of the depth-width ratio of the laser texturing, the molten CFRTP in the texturing was changed from fully filled to partially filled, and the joint shear properties showed a trend of first increasing and then decreased, and the joint failure mechanism was changed from hybrid fracture (adhesive failure + cohesive failure), CFRTP base material fracture to hybrid fracture. The joint performance reached its maximum when the depth-width ratio reached 1.2 to 1.6, at which point the fracture location was located in the CFRTP base material. The strengthening mechanisms of the aluminium alloy-CFRTP joint by laser texturing were enhancing mechanical embedding and the "nailing" effect of splashing.

     

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