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首页> 外文期刊>Journal of Manufacturing Processes >Effect of laser processing microstructure on the bonding strength and failure mode of 7075-T6 aluminum alloy adhesive joints
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Effect of laser processing microstructure on the bonding strength and failure mode of 7075-T6 aluminum alloy adhesive joints

机译：激光加工微观结构对7075-T6铝合金粘合剂粘接强度和破坏模式的影响

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摘要

The strength of adhesive joints of aluminum (Al) alloys can be enhanced by laser surface treatment. In this study, a nanosecond fiber laser was used to process crater array (CA), multi-groove (MG), and crater-array-multigroove (CA-MG) microstructures on 7075-T6 Al alloy substrates. The shear strength (a) was measured by a single-lap shear test. For the CA microstructure, how the pulse energy (E) and crater overlap rate (6) affect a was studied. For the MG and CA-MG microstructures, how E and the groove distance (H) affect a was studied. Also, the mechanism by which the characteristic parameters of each microstructure affect a was compared through the failure mode. The results show that when 6 = 30 %, the CA microstructure is the most conducive for improving the shear strength; however, regardless of the choice of E and 6, the CA microstructure leads to cohesive failure in part of the bonding region. The MG microstructure leads to cohesive failure in the entire bonding region only when H = 0; when H = 40 or 80 mu m, the region outside the grooves is prone to adhesive failure. Regardless of the choice of E and H, the CA-MG microstructure formed by two-step laser processing leads to cohesive failure in the entire bonding region. From the perspective of improving efficiency and saving energy, E = 880 mu J and 6 = 30 % should be selected for processing the CA microstructure and E = 176 mu J and H =80 mu m should be selected for processing the MG microstructure.
机译：通过激光表面处理可以提高铝（Al）合金的粘合剂接头的强度。在该研究中，纳秒光纤激光器用于处理7075-T6 Al合金基材上的陨石坑阵列（Ca），多槽（Mg）和火山口阵列 - 多谷物（Ca-Mg）微结构。通过单圈剪切试验测量剪切强度（a）。对于CA微观结构，研究了如何研究脉冲能量（e）和火山口重叠率（6）影响A.对于Mg和Ca-mg微观结构，研究了如何影响A和沟槽距离（H）的影响。此外，通过故障模式比较了每个微结构影响A的特征参数的机制。结果表明，当6 = 30％时，CA微观结构是改善剪切强度最有用的;然而，无论E和6的选择如何，Ca微结构导致部分粘合区域的内聚失效。 Mg微观结构仅在H = 0时引入整个粘合区域中的粘性故障;当H = 40或80 mu m时，凹槽外的区域容易发生粘合剂故障。无论E和H的选择如何，通过两步激光加工形成的Ca-Mg微观结构导致整个粘合区域中的内聚失效。从提高效率和节能的角度来看，应选择e =880μmj和6 = 30％，以加工Ca微结构，应选择E =176μmj和h =80μm以处理mg微结构。

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  • 来源
    《Journal of Manufacturing Processes》 |2021年第6期|302-312|共11页
  • 作者

    Zhang Chong; Chen Lingyu; Zhang Yongkang; Wang Guan; Jin Jie;

  • 作者单位

    Guangdong Univ Technol State Key Lab Precis Elect Mfg Technol & Equipmen Guangzhou 510006 Peoples R China|Guangdong Univ Technol Sch Electromech Engn Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol State Key Lab Precis Elect Mfg Technol & Equipmen Guangzhou 510006 Peoples R China|Guangdong Univ Technol Sch Electromech Engn Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol State Key Lab Precis Elect Mfg Technol & Equipmen Guangzhou 510006 Peoples R China|Guangdong Univ Technol Sch Electromech Engn Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol State Key Lab Precis Elect Mfg Technol & Equipmen Guangzhou 510006 Peoples R China|Guangdong Univ Technol Sch Electromech Engn Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol State Key Lab Precis Elect Mfg Technol & Equipmen Guangzhou 510006 Peoples R China|Guangdong Univ Technol Sch Electromech Engn Guangzhou 510006 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Laser processing; Microstructure; 7075-T6 Al alloy; Strength of adhesive joint; Failure mode;

    机译：激光加工;微观结构;7075-T6 AL合金;粘合剂的强度;故障模式;

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