Analysis of plastic flow of the Al alloy joint produced by friction stir spot welding
Analysis of plastic flow of the Al alloy joint produced by friction stir spot welding
复制标题
搅拌摩擦点焊铝合金接头塑性流动分析
DOI：
10.1080/09507110802543088
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发表时间：
2009
影响因子：
--
通讯作者：
Kokawa Hiroyuki
中科院分区：
文献类型：
--
作者：
Fujimoto Mitsuo;Koga Shinji;Abe Natsumi;Sato S. Yutaka;Kokawa Hiroyuki
本研究研究了铝合金搅拌摩擦点连接过程中搅拌区的发展和材料的塑性流动。通过观察不同工艺时间产生的接缝的宏观截面，讨论了搅拌区的发展。将金箔插入搭接表面的搅拌摩擦点连接试验和异种搭接摩擦搅拌点连接表明，搭接表面的移动归因于探针周围从上板到下板的向下塑性流动。此外，还发现塑性流动的方向与工具旋转的方向大致相同。不同的对接摩擦搅拌点连接表明，塑性流动不仅发生在搅拌区内，而且发生在工具肩部下方的更大区域中。本研究表明，探头表面的螺纹对于搅拌摩擦点连接过程中产生厚度方向的塑性流动非常重要。
This study examined development of the stir zone and plastic flow of the material during friction stir spot joining of aluminium alloys. The development of the stir zone was discussed through the observation of macro sections of the joints produced at various process times. The friction stir spot joining trial with insert of Au foil to lap surface and the dissimilar lap friction stir spot joining showed that the movement of the lap surface was attributed to the downward plastic flow from the upper plate to the lower plate around the probe. Additionally, it was clarified that the direction of the plastic flow was roughly the same as the direction of the tool rotation. The dissimilar butt friction stir spot joining suggested that the plastic flow occurred not only within the stir zone but also in a larger area below the tool shoulder. The present study revealed that the threads on the probe surface were important for producing the plastic flow of thickness direction during friction stir spot joining.