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材料工程  2018, Vol. 46 Issue (12): 137-143    DOI: 10.11868/j.issn.1001-4381.2017.001582
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
塞棒材料对铝合金摩擦塞补焊接头组织及拉伸断裂行为的影响
杜波1, 杨新岐1, 孙转平1,2, 王东坡1
1. 天津大学 天津市现代连接技术重点实验室, 天津 300350;
2. 天津长征火箭制造有限公司, 天津 300451
Effect of Plug Materials on Microstructure and Tensile Fracture Behavior of Aluminum Alloy Friction Plug Welds
DU Bo1, YANG Xin-qi1, SUN Zhuan-ping1,2, WANG Dong-po1
1. Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300350, China;
2. Tianjin Changzheng Rocket Manufacturing Co., Ltd., Tianjin 300451, China
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摘要 分别采用2A14-T6和2219-T87铝合金塞棒对6mm厚2219-T87铝合金板进行摩擦塞补焊实验,利用数字图像相关方法观测塞棒材料对拉伸过程中接头变形及断裂行为的影响,同时对两种接头的微观组织、显微硬度及拉伸断口进行观察与测试。结果表明:两种接头的组织特征相似,但2A14-T6接头的塞棒热力影响区发生部分再结晶的区域比2219-T87接头宽;塞棒材料对接头抗拉强度影响不大,但对伸长率影响显著,2219-T87接头抗拉强度可达346.2MPa,伸长率为5.76%;2A14-T6接头的抗拉强度可达351.2MPa,伸长率为3.54%;2219-T87接头的变形主要集中在软化的塞棒区和塞棒热力影响区,而2A14-T6接头的变形主要集中在软化的热力影响区和热影响区;再结晶区和接头软化区是整个接头的薄弱区,拉伸断口呈韧窝形貌。
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杜波
杨新岐
孙转平
王东坡
关键词 摩擦塞补焊2219-T87铝合金2A14-T6铝合金数字图像相关拉伸断裂行为    
Abstract:Friction plug welding (FPW) experiments were performed on 6mm 2219-T87 aluminium alloy using 2219-T87 and 2A14-T6 plugs. Digital image correlation method was used to determine the deformation and fracture behaviour of FPW joints in tensile process,meanwhile the microstructure, microhardness, and tensile fracture surface of the two FPW joints were observed and tested respectively. The results show that the two joints present similar microstructure, while 2A14-T6 joint exhibits wider partial recrystallized zone in plug thermo-mechanically affected zone than 2219-T87 joint. The plug material has slight effect on ultimate tensile strength, but has a significant effect on the elongation. The tensile strength and elongation of 2219-T87 joint can reach 346.2MPa and 5.76%, for 2A14-T6 joint, they are 351.2MPa, 3.54%. The deformation mainly concentrates in softening plug thermo-mechanically affected zone and plug metal for 2219-T87 joint, while the deformation concentrates in softening thermo-mechanically affected zone and heat affected zone for 2A14-T6 joint. Recrystallized zone and the softening zone are the weakening zones across the whole joint, and the tensile fracture morphologies are characterized by dimples.
Key wordsfriction plug welding    2219-T87 aluminium alloy    2A14-T6 aluminium alloy    digital image correlation    tensile fracture behaviour
收稿日期: 2017-12-22      出版日期: 2018-12-18
中图分类号:  TG453.9  
通讯作者: 杨新岐(1962-),男,教授,博士,主要从事搅拌摩擦焊方面的科研工作,联系地址:天津市津南区海河教育园雅观路135号天津大学固相摩擦焊接研究室174(300350),E-mail:xqyang@tju.edu.cn     E-mail: xqyang@tju.edu.cn
引用本文:   
杜波, 杨新岐, 孙转平, 王东坡. 塞棒材料对铝合金摩擦塞补焊接头组织及拉伸断裂行为的影响[J]. 材料工程, 2018, 46(12): 137-143.
DU Bo, YANG Xin-qi, SUN Zhuan-ping, WANG Dong-po. Effect of Plug Materials on Microstructure and Tensile Fracture Behavior of Aluminum Alloy Friction Plug Welds. Journal of Materials Engineering, 2018, 46(12): 137-143.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.001582      或      http://jme.biam.ac.cn/CN/Y2018/V46/I12/137
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