Numerical studies on effect of axial pressure in friction stir welding
Numerical studies on effect of axial pressure in friction stir welding
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DOI：
10.1179/174329307x177919
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发表时间：
2007-04
影响因子：
3.3
通讯作者：
Z. Zhang;H. W. Zhang
中科院分区：
文献类型：
--
作者：
Z. Zhang;H. W. Zhang
为了研究搅拌摩擦焊过程中轴向压力对材料性能和温度分布的影响，建立了搅拌摩擦焊热-力学全耦合模型。结果表明，轴向压力是影响FSW成功的关键因素。轴向压力不足或过大都会导致摩擦焊失效。前进侧和后退侧的物质流动情况不同，与实验观测结果吻合较好。随着轴向压力的增大，物料沿厚度方向的流动更加明显。随着轴向压力的增加，FSW温度场的最高温度和塑性贡献均增加。
A fully coupled thermomechanical model of friction stir welding (FSW) is developed in the current research to investigate the effect of the axial pressure on the material behaviours and temperature distributions in the FSW process. Results indicate that the axial pressure is a key factor for the successful FSW. Insufficient or excessive axial pressure leads to the failure of FSW. The material flows at the advancing side and the retreating side are different, which can be fitted well with the experimental observations. The material flows in the direction of the thickness become more obvious when the axial pressure is increased. The maximum temperature and plastic contribution to the temperature field in FSW can be both increased with the increase in the axial pressure.