Modelling and visualisation of material flow in friction stir spot welding
Modelling and visualisation of material flow in friction stir spot welding
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DOI：
10.1016/j.jmatprotec.2015.06.021
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发表时间：
2015-11-01
影响因子：
6.3
通讯作者：
Prangnell, Philip
中科院分区：
文献类型：
--
作者：
Reilly, Aidan;Shercliff, Hugh;Prangnell, Philip
采用无销工具在搭接接头几何形状中研究了铝与铝和钢的搅拌摩擦点焊中的材料流动。使用强度相似的不同铝合金，实验揭示了流动行为。对工具表面特征、焊接条件（旋转速度、插入深度、停留时间）和钢板的表面状态（未涂覆或镀锌）对材料流的影响进行了系统的研究。提出了一种新的运动学流动模型，它成功地预测了观察到的分层的不同的铝合金在一系列条件下。该模型和实验观察提供了一致的解释工具-工件界面的粘滑条件，解决了一个难以捉摸的和长期存在的问题，在摩擦搅拌加工中的发热建模。(C)2015爱思唯尔B. V.保留所有权利。
The material flow in friction stir spot welding of aluminium to both aluminium and steel has been investigated, using pinless tools in a lap joint geometry. The flow behaviour was revealed experimentally using dissimilar Al alloys of similar strength. The effect on the material flow of tool surface features, welding conditions (rotation speed, plunge depth, dwell time), and the surface state of the steel sheet (un-coated or galvanized) have been systematically studied. A novel kinematic flow model is presented, which successfully predicts the observed layering of the dissimilar Al alloys under a range of conditions. The model and the experimental observations provide a consistent interpretation of the stick-slip conditions at the tool-workpiece interface, addressing an elusive and long-standing issue in the modelling of heat generation-in friction stir processing. (C) 2015 Elsevier B.V. All rights reserved.