Friction stir spot fusion welding of low-carbon steel to aluminum alloy
Friction stir spot fusion welding of low-carbon steel to aluminum alloy
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DOI：
10.1016/j.jmatprotec.2016.08.034
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发表时间：
2017-02
影响因子：
6.3
通讯作者：
Ming-Jer Hsieh;Rong-Tsong Lee;Yuang-Cherng Chiou
中科院分区：
文献类型：
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作者：
Ming-Jer Hsieh;Rong-Tsong Lee;Yuang-Cherng Chiou
对厚度为5 mm和10 mm的6061-T6铝合金板材2 mm厚的低碳钢(SS400)薄板进行了搅拌摩擦焊点焊(FSSFW)，在下拉力为12 kN、转速为1200 rpm的条件下进行了不同停留时间的异种搭接焊接。铝合金板材在疲劳表面的中心区熔化，形成两层IMC层，经X射线衍射和扫描电子显微镜分析，确定为Fe2Al5和Fe4Al13。随着保温时间的延长，IMC厚度增加，但当IMC厚度大于25μm时，其增长速度变慢；破坏载荷随IMC厚度的增加而增加，但当IMC厚度大于17μm时，破坏载荷迅速下降。对于IMC层厚度为6~17μm的材料，在35~55℃的保温时间内，可达到18~22 KN。裂纹越大，破坏载荷越小。
Dissimilar lap joints for a low carbon steel (SS400) sheet with thickness of 2 mm on a 6061-T6 Al alloy sheet with thickness of 5 mm or 10 mm were created by a process called friction stir spot fusion welding (FSSFW) using an assembly-embedded rod (AER) tool under a downward force of 12 kN and a rotational speed of 1200 rpm at different dwell times. The Al alloy sheet was melted at the central area of the faying surface, so that two IMC layers were formed at this surface and identified as Fe2Al5and Fe4Al13, as detected by XRD and SEM images. The IMC thickness increased along with dwell time, but its increment rate became slower for IMC thickness larger than 25 μm. The failure load increased along with the IMC thickness, but the failure load decreased quickly for IMC thickness larger than 17 μm. It was able to achieve 18–22 kN for the thickness of the IMC layer in the range of 6–17 μm for a dwell time from 35–55 s. The larger the crack was, the smaller the failure load.