Interfacial microstructure and strength of steel/aluminum alloy lap joint fabricated by magnetic pressure seam welding
Interfacial microstructure and strength of steel/aluminum alloy lap joint fabricated by magnetic pressure seam welding
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DOI：
10.1016/j.msea.2007.04.033
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发表时间：
2007-12-15
期刊：
影响因子：
6.4
通讯作者：
Aizawa, Tomokatsu
中科院分区：
文献类型：
--
作者：
Lee, Kwang-Jin;Kumai, Shinji;Aizawa, Tomokatsu
采用磁压缝焊方法对低碳钢(SPCC)/A6111铝合金进行搭接。用透射电子显微镜对界面组织，特别是在焊缝界面形成的中间层进行了精确的观察。还对搭接接头进行了拉伸试验。在不升高温度的情况下，在几微秒内成功实现搭接。搭接接头的焊接界面呈波浪形，沿波浪形界面可观察到中间层。这些组织类似于爆炸焊接搭接接头的组织。透射电子显微镜观察表明，中间层由细小的铝颗粒(约100 nm)和弥散分布的金属间化合物颗粒组成。靠近焊缝界面的A6111母材也表现出极大的细化组织。接头的结合强度很高，在母板上发生了破坏。多相中间层和细晶铝层是搭接接头界面结合强度较高的原因。(C)2007 Elsevier B.V.保留所有权利。
Lap joining of low carbon steel (SPCC)/A6111 aluminum alloy was carried out using the magnetic pressure seam welding method. Interfacial microstructure, in particular, an intermediate layer formed at the weld interface was precisely examined using TEM. Tensile tests were also performed for the lap joints. Lap joining was successfully attained in several microseconds with no temperature increase. Weld interface of the lap joint showed wavy morphology and the intermediate layer was observed along the wavy interface. These microstructures are similar to that of the explosive weld lap joint. TEM observation revealed that the intermediate layers consist of fine aluminum grains (around 100 nm) and more finely dispersed intermetallic particles. A6111 matrix close to the weld interface also exhibited extremely refined grain structure. The bonding strength of the joint was quite high and it failed at the parent plate. The multi-phase intermediate layer and grain-refined aluminum layer are considered to be the origin of high interfacial bonding strength of the lap joint. (C) 2007 Elsevier B.V. All rights reserved.