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首页> 外文期刊>Journal of the Institution of Engineers (India), Series D. Metallurgical & Materials Engineering.Mining Engineering >A Study on Optimization of Welding Parameters and their Effect on Joint Properties of Dissimilar AA6082-T6 and AA7050-T7 Friction Stir Welds
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A Study on Optimization of Welding Parameters and their Effect on Joint Properties of Dissimilar AA6082-T6 and AA7050-T7 Friction Stir Welds

机译：AA6082-T6和AA7050-T7异种搅拌摩擦焊缝焊接参数优化及其对接头性能的影响研究

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摘要

This work investigates the effect of process parameters on joint properties of dissimilar AA6082-T6 and AA7050-T7 friction stir welds and determines the optimal value of process parameters using the grey-based Taguchi technique. At optimum welding parameters, similar friction stir welds of respective parent materials were developed for comparative study. Developed welds were evaluated in terms of macrostructure, microstructure, mechanical properties, and textural behaviour. Two types of plasticized material mixing patterns were observed in the weld nuggets, categorized as intercalated onion ring and interlocking lobes-based flow structures. Through electron backscattered diffraction, the fine nugget grain size was observed in dissimilar weld than weld nugget grain size of similar AA6082-T6 and AA7050-T7 welds. Unlike similar welds, the minimum hardness location lies toward the advancing side for all the dissimilar welds. Dissimilar welds' joint strength and yield strength efficiency were evaluated as 65.65 and 61.25 at optimum welding parameters, respectively. Fracture surface analysis revealed ductile behaviour in all the welded joints.
机译：本文研究了工艺参数对不同AA6082-T6和AA7050-T7搅拌摩擦焊缝接头性能的影响，并采用基于灰色的田口技术确定了工艺参数的最优值。在最佳焊接参数下，开发了各自母材的类似搅拌摩擦焊缝进行比较研究。从宏观结构、微观结构、机械性能和纹理性能方面对开发的焊缝进行了评估。在焊盘中观察到两种类型的塑化材料混合模式，分为插层洋葱环和基于互锁裂片的流动结构。通过电子背散射衍射，观察到异种焊缝的细核晶粒尺寸优于类似AA6082-T6和AA7050-T7焊缝的焊缝核晶粒尺寸。与类似焊缝不同，所有不同焊缝的最小硬度位置都朝向前进侧。在最佳焊接参数下，异种焊缝的接头强度和屈服强度效率分别为65.65%和61.25%。断裂面分析揭示了所有焊接接头的延展性。

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