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首页> 外文期刊>Journal of Materials Engineering and Performance >Interfacial Feature and Mechanical Property of Friction Stir Lap Repair Welded 7B04 Aluminum Alloy
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Interfacial Feature and Mechanical Property of Friction Stir Lap Repair Welded 7B04 Aluminum Alloy

机译：摩擦搅拌圈修复焊接7B04铝合金的界面特征和力学性能

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摘要

Friction stir repair welding of the lap structure of 2-mm-thick 7B04-T74 aluminum alloy is investigated in this study. A groove on the bottom plate surface was used to simulate the defect formed by the lap structure failure, by which an attempt was made to investigate the friction stir lap repair welding technology. The results show that the lap structure turns to butt-lap coexistent structure for the repair welding, leading to the variations of material flow patterns and weld formation features. Compared with the initial lap joint, both effective sheet thickness and effective lap width are improved in the repaired joints, and the hook tips of repaired joints are better metallurgically bonded. The nugget zone of repaired joint possesses significantly higher hardness than the initial joint. In addition, the fracture strength of the repaired joints is largely improved for advancing side loading configuration.
机译：研究了2mm厚7B04-T74铝合金搭接结构的搅拌摩擦补焊。利用底板表面的凹槽模拟搭接结构失效形成的缺陷，尝试研究搅拌摩擦搭接补焊工艺。结果表明，在补焊过程中，搭接组织转变为对接搭接共存组织，导致材料流动形态和焊缝成形特征发生变化。与初始搭接接头相比，修复接头的有效板厚和有效搭接宽度都有所提高，并且修复接头的钩尖具有更好的冶金结合。修复接头的熔核区硬度明显高于初始接头。此外，修复接头的断裂强度因侧向加载配置的改进而大大提高。

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