小搅拌针形状对搅拌摩擦焊6061铝合金显微组织和力学性能的影响（英文）

发布时间：2018-06-07 02:48

本文选题：搅拌摩擦焊 + 小搅拌针形状　；参考：《Transactions of Nonferrous Metals Society of China》2015年09期

【摘要】：研究小搅拌针形状对6061铝合金搅拌摩擦焊接头的显微组织和力学性能的影响。采用3种不同形状的搅拌针:螺纹锥形圆柱形(T1)、三角形(T2)和正方形(T3)。结果表明:不同形状的搅拌针会显著地影响焊接接头的性能。相对于使用其他形状的搅拌针,使用三角形搅拌针能获得最好的冶金和力学焊接性能。此外,使用正方形搅拌针制备的搅拌摩擦焊接头具有最低的拉伸强度和显微硬度。更小的搅拌针形状和轴肩直径导致热影响区域变窄和一定程度的软化。断口分析结果表明,不同形状的搅拌针焊接也能影响接头。断裂面显示三角形搅拌针制备的样品在拉伸试验中以韧性断裂形式失效,而在用其他形状的搅拌针(T1和T2)制备的接头中观察到了脆性断裂。
[Abstract]:The effect of the shape of small stir needle on the microstructure and mechanical properties of 6061 aluminum alloy friction stir welding joint was studied. Three kinds of mixing needles of different shapes were used: thread conical cylinder (T1), triangulation (T2) and square (T3). The results show that the properties of welded joints can be significantly affected by different shapes of mixing needles. The use of triangular agitators provides the best metallurgical and mechanical weldability compared to the use of other shapes of stirring needles. In addition, the friction stir welded joints prepared with square stir needles have the lowest tensile strength and microhardness. Smaller stitch shapes and shoulder diameters lead to narrower heat-affected areas and a certain degree of softening. Fracture analysis results show that different shapes of mixing needle welding can also affect the joint. The fracture surface showed that the samples prepared by triangular stirring needle failed in the form of ductile fracture in tensile test, while brittle fracture was observed in the joints prepared by mixing needles T1 and T2 with other shapes.
【作者单位】： School
【基金】：supported by the grant No.900100338 of the Universiti Malaysia Perlis (Uni MAP) the outstanding support provided by the staff in the School of Materials Engineering in Uni MAP the Centre for Low Carbon Transport and Institute for Vehicle System Engineering in Universiti Teknologi Malaysia (UTM) the School of Materials Engineering and Mineral Resources in Universiti Sains Malaysia (USM)
【分类号】：TG457.14

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