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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Rotation Speed on the Microstructure and Mechanical Properties of Friction-Stir-Welded CuSn6 Tin Bronze
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Effect of Rotation Speed on the Microstructure and Mechanical Properties of Friction-Stir-Welded CuSn6 Tin Bronze

机译：旋转速度对摩擦型焊接CUSN6锡青铜微观结构和力学性能的影响

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摘要

Four-mm-thick CuSn6 tin bronze plates were friction stir welded at a constant tool traverse speed of 100?mm?min_(?1). Favorable joints could be obtained with rotation speeds ranging from 600 to 1000?rev?min_(?1), and groove was found on the surface of the joint under 400?rev?min_(?1). The microstructure of the weld nugget zone was characterized by equiaxed recrystallized grains with heterogeneity along the thickness direction. Moreover, the grain size of the thermo-mechanically affected zone and stir zone increased with the increase in rotation speed. Hardness of the stir zone was higher than that of other zones due to microstructural refinement. There was little change in tensile properties of the defect-free welded joints. During tensile test, all of the defect-free joints were fractured at heat-affected zone with typical plastic fracture.
机译：以恒定的刀具横步速度为100Ωmm≤mm_（α1），摩擦搅拌摩擦搅拌摩擦搅拌摩擦搅拌搅拌搅拌摩擦搅拌搅拌。 可以使用从600到1000的转速获得有利的关节？Rev？min _（α1），并且在400下方的接头表面上找到凹槽？Rev？min _（？1）。 焊接块区的微观结构的特征在于等轴的再结晶颗粒，其具有沿厚度方向的异质性。 此外，热机械受影响区和搅拌区的粒度随着转速的增加而增加。 由于微观结构细化，搅拌区的硬度高于其他区域的硬度。 无缺陷焊接接头的拉伸性能几乎没有变化。 在拉伸试验期间，所有缺陷接头在具有典型塑料骨折的热影响区域处被破裂。

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