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首页> 外文期刊>Journal of Materials Engineering and Performance >Friction Spot Extrusion Welding on Dissimilar Materials AA2024-T3 to AA5754-O: Effect of Shoulder Plunge Depth
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Friction Spot Extrusion Welding on Dissimilar Materials AA2024-T3 to AA5754-O: Effect of Shoulder Plunge Depth

机译：不同材料摩擦点挤出焊接AA2024-T3至AA5754-O：肩部暴跌深度的影响

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摘要

In the present investigation, friction spot extrusion welding was investigated for dissimilar AA2024-T3 and AA5754-O materials, under the effect of three different shoulder plunge depths of 0.25, 0.35 and 0.45 mm, keeping other parameters constant. The welded specimens were evaluated by visual inspection, optical microscopy, scanning electron microscopy, electron backscattered diffractions, and tensile testing. The results revealed that the effective metallurgical bonding and mechanical locking were obtained in case of weld produced by plunge depth of 0.45 mm. The metallurgical bonding is obtained between extruded material and surfaces of predrilled cavity, whereas mechanical locking is obtained through filling an extruded material in the predrilled cavity. The plunge depth variations influence the grain structures of processed zones. Increased plunge depth of 0.45 mm results in effective materials mixing with zigzag pattern of oxide layer mixed in the stir zone. In case of weld produced by plunge depth of 0.25 mm, the oxide layer was found as separating layer between workpieces. The weld produced by maximum plunge depth of 0.45 mm was resulted to higher fracture load of 5198 N. Trans-granular ductile fracture was observed for weld produced by plunge depth of 0.45 mm.
机译：在本研究中，在保持其他参数不变的情况下，在0.25、0.35和0.45mm的三种不同肩部插入深度的影响下，对不同的AA2024-T3和AA5754-O材料进行了摩擦点挤压焊接研究。焊接试样通过目视检查、光学显微镜、扫描电子显微镜、电子背散射衍射和拉伸试验进行评估。结果表明，对于插入深度为0.45mm的焊缝，可获得有效的冶金结合和机械锁定。在挤压材料和预钻孔空腔表面之间实现冶金结合，而通过在预钻孔空腔中填充挤压材料实现机械锁定。浸入深度的变化会影响加工区的晶粒结构。增加0.45 mm的浸入深度会导致有效材料混合，搅拌区混合的氧化层呈之字形。如果焊接深度为0.25 mm，则发现氧化层是工件之间的隔离层。最大插入深度为0.45 mm的焊缝产生了5198 N的更高断裂载荷。插入深度为0.45 mm的焊缝观察到跨颗粒韧性断裂。

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