铝合金平板对接焊接接头变形及损伤行为研究-《郑州大学学报(工学版)》

文章信息/Info

Title:: Study on Deformation and Damage Behavior of Aluminum Alloy Plate Butt Welding Joint

作者:: 车洪艳; 徐文福; 陈剑虹.; 兰州理工大学,材料科学与工程学院,甘肃,兰州,730050;兰州理工大学,甘肃省有色金属新材料省部共建国家重点实验室,甘肃,兰州,730050, 兰州理工大学,材料科学与工程学院,甘肃,兰州,730050;兰州理工大学,甘肃省有色金属新材料省部共建国家重点实验室,甘肃,兰州,730050, 兰州理工大学,材料科学与工程学院,甘肃,兰州,730050;兰州理工大学,甘肃省有色金属新材料省部共建国家重点实验室,甘肃,兰州,730050

Author(s):: CHE Hongyan; XU Wenfu; CHEN Jianhong; 1·College of Materials Science and Engineering，Lanzhou University of Technology，Lanzhou 730050，China；2．State Key Labo—ratory of Gansu Advanced Non—ferrous Metal Materials，Lanzhou 730050，China

摘要:: 应用TIG焊获得焊缝质量良好的6061铝合金对接焊接接头,进行静态拉伸试验;试验结果表明,试样大多断裂在距焊缝熔合线边缘7～9 mm处的软化区;应用双孔微剪切试验与有限元结合获得焊接接头各微区的力学性能及损失参数,提供给有限元计算,建立静态拉伸试验的有限元模型,并与实际试验结果对比验证模型的正确性,在此基础上研究高匹配和低匹配焊接接头及试样相对宽度对焊接接头失效行为的影响,结果表明,对于低匹配焊接接头,接头越窄越容易失效,所以应尽量选择较宽的焊接接头;对于高匹配焊接接头,接头越窄,越不容易失效,所以建议应尽量选择较窄的焊接接头.

Abstract:: TIG welding was used to obtain 6061 aluminum alloy butt welded joints with good weld quality, and static tensile tests were carried out; The test results show that most of the samples are fractured in the softening zone 7~9 mm away from the edge of the weld fusion line. The mechanical properties and loss parameters of each micro-region of the welded joint are obtained by combining the double-hole microshear test with finite element, which is provided to the finite element calculation, and the finite element model of the static tensile test is established, and the correctness of the model is verified by comparison with the actual test results, on this basis, the influence of the relative width of the high-matching and low-matching welded joints and specimens on the failure behavior of the welded joints is studied, and the results show that for low-matching welded joints, the narrower the joint, the easier it is to fail, so the wider welded joints should be selected as much as possible; For high-matching welded joints, the narrower the joint, the less likely it is to fail, so it is recommended that narrower welded joints should be selected as much as possible.