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首页> 外文期刊>Advances in Mechanical Engineering >Effect of tool rotational speed on mechanical properties and microstructure of friction stir welding joints within Ti–6Al–4V alloy sheets:
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Effect of tool rotational speed on mechanical properties and microstructure of friction stir welding joints within Ti–6Al–4V alloy sheets:

机译：刀具转速对Ti-6Al-4V合金薄板内摩擦搅拌焊接接头的力学性能和组织的影响：

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摘要

Friction stir welding of Ti–6Al–4V alloy sheets was successfully performed with a tungsten carbide (WC) tool, and the effect of the tool rotational speed on the microstructure and mechanical properties of the joints was evaluated. The microstructure was investigated using field emission scanning electron microscopy, electron backscattered diffraction and X-ray diffraction measurements. Tensile, Charpy impact and Vickers hardness tests were performed to evaluate the joints’ mechanical properties. The process peak temperature of each welding condition was measured at the bottom of a specimen. Regardless of the welding conditions, the alpha (α) and alpha prime (α′) phases were detected in the stir zone, whereas the base metal was composed of alpha (α) and beta (β) phases. The tensile strength and hardness of the stir zone increased as the tool rotational speed increased. The impact absorption energy was found to be equal to that of the base metal. Moreover, a phase transformation from the β to the α′ phases ...
机译：使用碳化钨（WC）工具成功地进行了Ti-6Al-4V合金板的摩擦搅拌焊接，并评估了工具转速对接头的显微组织和机械性能的影响。使用场发射扫描电子显微镜，电子反向散射衍射和X射线衍射测量研究了显微结构。进行了拉伸，夏比冲击和维氏硬度测试，以评估接头的机械性能。在样品底部测量每种焊接条件的过程峰值温度。不论焊接条件如何，在搅拌区都可以检测到α（α）和α'素相（α'）相，而贱金属则由α（α）和β（β）相组成。搅拌区的抗拉强度和硬度随着工具转速的增加而增加。发现冲击吸收能量等于贱金属的冲击吸收能量。此外，从β相到α′相的相变...

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