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首页> 外文期刊>Journal of Materials Engineering and Performance >Homogeneity of Mechanical Properties of Underwater Friction Stir Welded 2219-T6 Aluminum Alloy
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Homogeneity of Mechanical Properties of Underwater Friction Stir Welded 2219-T6 Aluminum Alloy

机译：水下摩擦搅拌焊接2219-T6铝合金力学性能的均质性

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摘要

Underwater friction stir welding (FSW) has been demonstrated to be available for the improvement in tensile strength of normal FSW joints. In order to illuminate the intrinsic reason for strength improvement through underwater FSW, a 2219 aluminum alloy was underwater friction stir welded and the homogeneity of mechanical properties of the joint was investigated by dividing the joint into three layers. The results indicate that the tensile strength of the three layers of the joint is all improved by underwater FSW, furthermore, the middle and lower layers have larger extent of strength improvement than the upper layer, leading to an increase in the homogeneity of mechanical properties of the joint. The minimum hardness value of each layer, especially the middle and lower layers, is improved under the integral water cooling effect, which is the intrinsic reason for the strength improvement of underwater joint.
机译：水下摩擦搅拌焊（FSW）已被证明可用于改善普通FSW接头的抗拉强度。为了阐明通过水下FSW改善强度的内在原因，对2219铝合金进行水下摩擦搅拌焊接，并将接头分为三层，研究了接头力学性能的均质性。结果表明，水下FSW提高了接头三层的抗拉强度，此外，中层和下层的强度提高幅度均大于上层，从而导致了力学性能的均匀性提高。关节。在整体水冷效果下，每一层，特别是中下层的最小硬度值得到了改善，这是水下接头强度提高的内在原因。

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