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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Tool Rotation Rate on Microstructure and Mechanical Behavior of Friction Stir Spot-Welded Al/Cu Composite
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Effect of Tool Rotation Rate on Microstructure and Mechanical Behavior of Friction Stir Spot-Welded Al/Cu Composite

机译：工具转速对搅拌摩擦点焊Al / Cu复合材料组织和力学行为的影响

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摘要

In this study, the friction stir spot welding of Al/Cu composite produced by accumulative roll-bonding process was performed using a triangular pin with no features. The influence of tool rotation rate on the microstructure, surface hardness, and tensile shear strength was examined. The results indicated that the weld made at lower tool rotation rate was not bonded because there was no intermixing between the upper and lower sheets. The maximum shear failure load increased with the increasing tool rotation rate, and reached a maximum value at 1400 rpm, which can be ascribed to the increasing area and effective length (d) of stir zone (SZ). The experimental observations showed the presence of the intermetallic compounds (Al_2Cu and AlCu_3) in the SZ. It was concluded that the intermetallic compounds, accompanied by the material crushing, increased the hardness of the SZ.
机译：在这项研究中，使用无特征的三角形销钉进行了通过累积辊压焊接工艺生产的Al / Cu复合材料的摩擦搅拌点焊。检验了工具转速对组织，表面硬度和拉伸剪切强度的影响。结果表明，在较低的刀具转速下进行的焊缝没有粘结，因为在上层板和下层板之间没有混合。最大剪切破坏载荷随着工具转速的增加而增加，并在1400 rpm时达到最大值，这可归因于搅拌区（SZ）的面积增加和有效长度（d）。实验观察表明，在深圳存在金属间化合物（Al_2Cu和AlCu_3）。结论是金属间化合物，伴随着材料的破碎，增加了SZ的硬度。

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