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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Hydrogen generation for sensing and control in submerged friction stir welding
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Hydrogen generation for sensing and control in submerged friction stir welding

机译:埋入式搅拌摩擦焊中氢气的产生与控制

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摘要

Friction stir welding (FSW) is a recently developed welding technique, where the metals that are welded are not melted. FSW takes place at temperatures below the solidus points of the metals that are joined. FSW is thus a solid-state process. This can yield weldments of a significantly higher strength than those achieved by traditional fusion welding processes. This is due to the enhanced grain structure of the FSW materials. Submerged FSW is performed underwater for structural purposes such as oil platforms and pipelines, or in industrial settings and laboratories in order to further enhance the strength of the weldments, sometimes exceeding the strength of the parent materials. Submerged FSW, due to the significantly lower temperatures of the process compared to FSW in air, yields even more enhanced grain structures and greater strengths. In the experiments performed here, it is shown that the hydrogen generated during submerged FSW is produced at rates and quantities sufficient to be easily detected by means of a fuel cell. The generated hydrogen, which is a function of the FSW parameters, can be used as a means of sensing and control of submerged FSW which can be applied to robotic and automatic submerged FSW.
机译:搅拌摩擦焊(FSW)是最近开发的一种焊接技术,在这种情况下,被焊接的金属不会熔化。 FSW的发生温度低于所连接金属的固相线温度。因此,FSW是一个固态过程。与传统的熔焊工艺相比,这可以产生强度更高的焊件。这是由于FSW材料的晶粒结构增强。浸入式FSW在水下用于结构目的,例如石油平台和管道,或在工业环境和实验室中进行,以进一步增强焊件的强度,有时会超过母材的强度。与空气中的FSW相比,浸入式FSW的加工温度要低得多,因此其晶粒结构和强度得到了更大的提高。在这里进行的实验中,表明了在淹没的FSW过程中产生的氢气的产生速率和数量足以通过燃料电池容易地检测到。所产生的氢是FSW参数的函数,可以用作感测和控制浸入式FSW的手段,该方法可以应用于机器人和自动浸入式FSW。

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