Scaling of coupled heat transfer and plastic deformation around the pin in friction stir welding
Scaling of coupled heat transfer and plastic deformation around the pin in friction stir welding
复制标题
DOI：
10.1016/j.actamat.2010.07.019
复制
发表时间：
2010-10
期刊：
影响因子：
9.4
通讯作者：
P. Mendez;K. Tello;T. Lienert
中科院分区：
文献类型：
--
作者：
P. Mendez;K. Tello;T. Lienert
建立了搅拌摩擦焊过程中搅拌头周围传热与塑性流动的耦合唯象模型。该方法类似于流体力学中的边界层分析，并且基于缩放方法。结果是一组新的封闭形式的表达式达到的最高温度的过程中，剪切层的厚度，剪切应力周围的销，扭矩和肩部的热效应。所提出的模型侧重于搅拌摩擦焊实践中遇到的最常见的条件，这涉及相对较低的平移速度，相对较高的旋转速度和薄剪切层。该模型的最终目的是提供简单而准确的表达式，为FSW的冶金分析提供温度和应变速率环境，并在使用FSW连接新型合金时选择工艺参数。
This paper presents a coupled phenomenological model of heat transfer and plastic flow around the pin in friction stir welding (FSW). The approach is analogous to the boundary layer analysis in fluid mechanics, and is based on the methodology of scaling. The results are a set of novel closed-form expressions for the maximum temperature reached in the process, the thickness of the shear layer, the shear stress around the pin, the torque and the thermal effect of the shoulder. The model presented focuses on the most common conditions encountered in the practice of FSW, which involve relatively slow translation velocities, relatively high rotation velocities and thin shear layers. The ultimate purpose of this model is to provide simple and accurate expressions useful for providing a temperature and strain rate context for metallurgical analysis of FSW and for the selection of process parameters when using FSW to join novel alloys.