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首页> 外文期刊>Journal of Manufacturing Processes >The influence of process parameters in friction stir welding of Al-Mg alloy and polycarbonate
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The influence of process parameters in friction stir welding of Al-Mg alloy and polycarbonate

机译：工艺参数对铝镁合金与聚碳酸酯摩擦搅拌焊的影响

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摘要

The Role of rotating and travelling speed of the friction stir welding (FSW) tool on the dissimilar lap-joining of an AA5058 aluminum alloy and polycarbonate (PC) sheets has been investigated. The Relation of the processing parameters with tensile, bending strength, material flow and hardness of the joints were studied to attain defectfree joints with proper mechanical strength. The results showed both the size and the contribution of PC and aluminum alloy on the formation of stir zone are strongly related to the tool's rotational speed. Tool's rotational speed mainly controls the joint strength and the fracture mode, while traverse velocity affects the size of aluminum fragments within the PC matrix. The most suitable dissimilar lap-joining microstructure is achieved at 1600 rpm and 45 mm/min tool speed. Under this condition, the maximum joint tensile and bending strengths attained are 68.2% (46 MPa) and 69.4% (60 MPa) of PC raw material respectively. Fractography indicated that during the tensile test, the rupture occurs below and in the middle of the stir zone on AA5058 alloy/PC interface during the bending test. The hardness of the PC after FSW decreased by the molecular weight reduction and AA5058 micro-hardness increased because of the fine grinding after suffering thermo-mechanical cycle.
机译：研究了搅拌摩擦焊接（FSW）工具的旋转速度和行进速度在AA5058铝合金和聚碳酸酯（PC）板的不同搭接中的作用。研究了加工参数与接头抗拉强度，弯曲强度，材料流动性和硬度之间的关系，以获得具有适当机械强度的无缺陷接头。结果表明，PC和铝合金的尺寸以及对搅拌区形成的贡献均与工具的旋转速度密切相关。刀具的旋转速度主要控制接头强度和断裂方式，而移动速度会影响PC基质中铝碎片的大小。在1600 rpm和45 mm / min的工具速度下可获得最合适的异形搭接显微组织。在此条件下，所获得的最大接头抗拉强度和弯曲强度分别为PC原料的68.2％（46 MPa）和69.4％（60 MPa）。断裂图表明，在拉伸试验期间，在弯曲试验期间，AA5058合金/ PC界面的搅拌区下方和中间发生断裂。 FSW后PC的硬度因分子量降低而降低，而AA5058显微硬度则由于经受热机械循环后的细磨而增加。

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