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首页> 外文期刊>Journal of the Institution of Engineers (Inida) >Microstructural Characterizations with EDAX Analysis of Dissimilar Friction Stir Welds
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Microstructural Characterizations with EDAX Analysis of Dissimilar Friction Stir Welds

机译：用EDAX分析不同搅拌摩擦焊缝的显微组织

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摘要

This paper reports the microstructural characteristics of dissimilar friction stir welds with AA7075T651 and AA6061T651. Dissimilar friction stir welds between AA7075T651 and AA6061T651 were produced by varying the rotational speeds between 800 and 1,000 rpm and the welding speeds between 90 and 110 mm/min. The welds were characterized through optical microscope and scanning electron microscope (SEM). Three different tool profiles (taper cylindrical threaded, taper square threaded and simple square) were used for this investigation and in that taper cylindrical threaded tool with process parameters 900 rpm and·100 mm/min were found to have maximum tensile strength of 205 MPa for the dissimilar butt joints. The SEM with energy-dispersive X-ray spectroscopy analysis reveals the metallurgical bonding achieved at the joint interfaces of the welds produced. The good mixing of both the materials joined was obtained at lower welding and higher rotational speed while the tunnel defect was found to be common in the welds produced irrespective of the tool pin profiles and process parameters due to insufficient axial load with 0° tilt angle.
机译：本文报道了AA7075T651和AA6061T651异种搅拌摩擦焊的显微组织特征。通过在800和1,000 rpm之间改变转速，在90和110 mm / min之间改变焊接速度，在AA7075T651和AA6061T651之间产生了不同的搅拌摩擦焊。通过光学显微镜和扫描电子显微镜（SEM）对焊缝进行表征。三种不同的工具轮廓（锥度圆柱螺纹，锥度方螺纹和简单方型）用于此研究，并且发现加工参数为900 rpm和·100 mm / min的锥度圆柱形螺纹工具在205 MPa时的最大抗拉强度为205 MPa。不同的对接关节。带有能量色散X射线光谱分析的SEM显示出在所产生的焊缝的接合界面处实现了冶金结合。在较低的焊接速度和较高的旋转速度下，两种材料均能很好地混合，同时发现，由于0°倾斜角的轴向载荷不足，无论工具销的外形和工艺参数如何，所产生的焊缝中普遍存在隧道缺陷。

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