Effect of a Zinc Interlayer on a Cu/Al Lap Joint in Ultrasound-Assisted Friction Stir Welding
Effect of a Zinc Interlayer on a Cu/Al Lap Joint in Ultrasound-Assisted Friction Stir Welding
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超声辅助搅拌摩擦焊中锌中间层对铜/铝搭接接头的影响
DOI：
10.1007/s11665-019-04244-3
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发表时间：
2019-08
影响因子：
2.3
通讯作者：
Wang Jianxin
中科院分区：
文献类型：
--
作者：
Chen Shujin;Wang Di;Li Ruifeng;Liu Bin;Wang Jianxin
本研究提出了一种焊接工艺，即异种铝/铜金属的超声波辅助搅拌摩擦焊。利用无针搅拌工具产生的热量熔化锌箔，并通过超声波空化搅拌熔化的中间层以实现有效连接。研究了声场作用下接头的冶金反应行为，分析了不同显微组织对接头性能的影响。具体来说，本研究报告了以下观察结果：（1）当使用超声辅助时，空化效应使Al2Cu脆性金属间化合物从连续分布变为块状分布，接头的力学性能大大提高； (2)还确定了锌厚度的影响。结果表明，当锌箔厚度为0.2 mm时，获得最大剪切拉力。当厚度为0.3mm时，超声作用减弱。铜侧界面生成了锯齿形的Al4.2Cu3.2Zn0.7层，厚度为3.4μm，且具有连续分布。然而，将锌的厚度增加到 0.5 mm，由于锌层的不完全熔化，接头的机械性能急剧下降。
This study proposes a welding process, ultrasound-assisted friction stir welding of dissimilar Al/Cu metals. Zinc foil is melted using the heat generated by a pinless stirring tool, and the molten intermediate layer is stirred by ultrasonic cavitation to achieve an effective connection. The metallurgical reaction behavior of the joint under the action of the sound field was studied, and the effects of different microstructures on the joint performance were analyzed. Specifically, the following observations were reported in this study: (1) When ultrasound assistance was used, the cavitation effect changed the brittle intermetallic compounds of Al2Cu from a continuous distribution to a block distribution, and the mechanical properties of the joint were greatly improved; (2) the effects of the thickness of the zinc were also determined. The results showed that the highest shear tensile force was obtained when the thickness of the zinc foil was 0.2 mm. When the thickness was 0.3 mm, the ultrasound effect was weakened. The copper-side interface generated a zigzag-shaped Al4.2Cu3.2Zn0.7 layer with a thickness of 3.4 μm and had a continuous distribution. Increasing the thickness of the zinc to 0.5 mm, however, drastically decreased the mechanical properties of the joint due to incomplete melting of the zinc layer.
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DOI：
10.1016/s1003-6326(16)64195-x
发表时间：
2016-04
影响因子：
4.5
作者：
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影响因子：
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DOI：
10.1179/1362171813y.0000000114
发表时间：
2013-05-01
影响因子：
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作者：
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DOI：
10.1016/j.jmatprotec.2013.05.004
发表时间：
2013-11-01
影响因子：
6.3
作者：
Galvao, I.;Verdera, D.;Rodrigues, D. M.
通讯作者：
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