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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Shear flow and formation of Nugget zone during friction stir welding of aluminium alloy 5083-O
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Shear flow and formation of Nugget zone during friction stir welding of aluminium alloy 5083-O

机译：铝合金5083-O摩擦搅拌焊接过程中的剪切流和熔核区的形成

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摘要

The flow of the shear layer around the tool pin and how it deposits into the cavity at the trailing end of the pin to form the weld Nugget zone during friction stir welding (FSW) had not been fully understood. In this study, FSW experiments were conducted to result in pins broken and embedded in the workpiece of a work-hardened aluminium alloy during FSW, followed by metallography analysis of the weld samples. Evidence has suggested that a portion of the shear zone formed a layer and detached in a trailing-retreating location of the pin, one in each revolution. The shear layer detached from the pin leaving little material to rotate with the pin. The detached layers continued to flow, pushed by the incoming material in the shear zone, filling the stable and forward moving cavity afterward. The velocity of the freshly deposited shear layer was very low in comparison to the pin periphery velocity.
机译：在摩擦搅拌焊（FSW）过程中，围绕刀具销的剪切层的流动及其在销的尾端如何沉积到模腔中以形成焊核区域的方式尚未得到充分了解。在这项研究中，进行了FSW实验，结果是在FSW期间导致销钉断裂并嵌入加工硬化铝合金的工件中，然后对焊缝样品进行金相分析。有证据表明，剪​​切区的一部分形成了一层，并在销的后退位置上分离，每一转一圈。剪切层从销钉上脱落，几乎没有材料随销钉旋转。分离的层继续流动，在剪切区域中被进入的物料推动，随后填充稳定且向前移动的空腔。与销的圆周速度相比，新沉积的剪切层的速度非常低。

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