Effect of process parameters on material flow and residual stress in friction stir welding

被引：5

作者：

Zhang, Hongwu ^{[1
]}

Zhang, Zhao ^{[1
]}

Chen, Jintao ^{[1
]}

机构：

[1] State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology

来源：

Jixie Gongcheng Xuebao/Chinese Journal of Mechanical Engineering | 2006年 / 42卷 / 07期

关键词：

Finite element simulation; Friction stir welding; Material flow; Residual stress;

D O I：

10.3901/JME.2006.07.103

中图分类号：

学科分类号：

摘要：

A two-dimensional model of friction stir welding is established to study the distributions of the longitudinal residual stress and the material flow under different process parameters. In the friction stir welding process, the tangent flow constitutes the major part in material flow. The faster material flow occurs on the retreating side. In the tangent flow, the flow direction is not simple and there may exist a swirl in the material flow on the advancing side. With the increase of translational velocity and the angular velocity of pin, the flow becomes faster on the retreating side. But in the region where the material velocity is smaller, the effect of the variation of process parameters is not clear. The maximum longitudinal residual stress occurs on the boundary of heat affected zone and the longitudinal residual stress is positive near the welding line but negative near the boundaries of welded plate. The maximum longitudinal residual stress can be increased with the argument of the translational velocity of pin. But the change of the angular velocity of pin does not affect the longitudinal residual stress significantly.

引用

页码：103 / 108

页数：5

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