Even though friction stir welding (FSW) has been shown to produce high performing butt joints, stress concentration at the weld edges in overlap FSW significantly reduces the performance of these joints. By combining FSW and adhesive bonding into a friction stir (FS) weld bonding, joint mechanical performance is greatly improved. Quasistatic and fatigue strength of the proposed FS weld‐bonding joints was assessed and benchmarked against overlap FSW and adhesive bonding. The characterization of the structural adhesive is also presented, including differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), as well as mechanical characterization with curing temperature. A small process parameter study was made to select proper FSW parameters for AA6082‐T6 overlap FSW and FS weld‐bonded joints. FS weld bonding achieved a significant increase in quasistatic and fatigue strength when compared with overlap FSW, with 79.9% of the fatigue strength of adhesive‐bonded joints at 10⁶ cycles, whereas FSW had 41.6%.

中文翻译：

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搅拌摩擦结合和粘合的AA6082-T6搭接接头的疲劳特性

即使已经显示搅拌摩擦焊（FSW）可以产生高性能的对接接头，但是重叠FSW的焊缝边缘处的应力集中会显着降低这些接头的性能。通过将FSW和粘合剂结合到搅拌摩擦（FS）焊接中，可以大大提高接头的机械性能。评估了拟议的FS焊接接头的准静态和疲劳强度，并针对重叠的FSW和胶粘剂进行了基准测试。还介绍了结构粘合剂的特性，包括差示扫描量热法（DSC）和热重分析（TGA），以及随固化温度的机械特性。进行了一个小的工艺参数研究，以为AA6082-T6重叠FSW和FS焊接接头选择合适的FSW参数。⁶个周期，而FSW有41.6％。