Approach to disrupting thick intermetallic compound interfacial layer in friction stir brazing (FSB) of Al/Cu plates
Approach to disrupting thick intermetallic compound interfacial layer in friction stir brazing (FSB) of Al/Cu plates
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DOI：
10.1179/1362171814y.0000000224
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发表时间：
2014-08
影响因子：
3.3
通讯作者：
Guifeng Zhang;Kai Zhang;Lingmin Zhang;Jie Zhang
中科院分区：
文献类型：
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作者：
Guifeng Zhang;Kai Zhang;Lingmin Zhang;Jie Zhang
搅拌摩擦钎焊 (FSB) 是为异种材料连接而开发的，旨在通过冶金反应而不是塑性流动来克服搅拌摩擦搭接焊的相关问题（例如销磨损、狭窄的结合区域、钩状缺陷）。为了增强旋转肩部的热机械效应，在 5 毫米厚的铝/铜板 FSB 中使用了具有 30 毫米直径大肩部的无销工具，采用锌钎焊形成阶梯搭接配置。与使用直径20毫米的普通刀具的情况相比，发现虽然金属间化合物（IMC）层生长得很厚，但它被破碎成颗粒，并且消除了厚IMC层内的端部裂纹。结果，接头不是沿界面断裂，断裂载荷增加了 2271 N。这项工作提出了一种通过增强旋转肩部的机械效应将连续 IMC 破碎成颗粒的方法。
Friction stir brazing (FSB) was developed for dissimilar joining to overcome the problems associated with friction stir lap welding (e.g. pin wear, narrow bonded area, hook defect) by metallurgical reaction instead of plastic flow. To enhance the thermomechanical effect of the rotating shoulder, a pin free tool with a large shoulder of 30 mm diameter was used in FSB of 5 mm thick Al/Cu plates in stepped lap configuration with Zn braze. Compared to the case using common tool of 20 mm diameter, it was found that although the intermetallic compound (IMC) layer grew thickly, it was disrupted into particles, and end crack within thick IMC layer was eliminated. As a result, the joint fractured not along interface and the fracture load increased by as much as 2271 N. This work proposed an approach to disrupting continuous IMC into particles by enhancing the mechanical effect of rotating shoulder.