销钉形状对铝-钢搅拌摩擦焊接接头热历史的影响：计算流体动力学建模与验证

Effect of Pin Shape on Thermal History of Aluminum-Steel Friction Stir Welded Joint: Computational Fluid Dynamic Modeling and Validation.

作者信息

Bokov Dmitry Olegovich, Jawad Mohammed Abed, Suksatan Wanich, Abdullah Mahmoud E, Świerczyńska Aleksandra, Fydrych Dariusz, Derazkola Hamed Aghajani

机构信息

Pharmaceutical Natural Sciences Department Institute of Pharmacy, Sechenov First Moscow State Medical University, 8 Trubetskaya St., Bldg. 2, 119991 Moscow, Russia.

Department of Medical Laboratory Technology, Al-Nisour University College, Baghdad 6770, Iraq.

出版信息

Materials (Basel). 2021 Dec 20;14(24):7883. doi: 10.3390/ma14247883.

This article studied the effects of pin angle on heat generation and temperature distribution during friction stir welding (FSW) of AA1100 aluminum alloy and St-14 low carbon steel. A validated computational fluid dynamics (CFD) model was implemented to simulate the FSW process. Scanning electron microscopy (SEM) was employed in order to investigate internal materials' flow. Simulation results revealed that the mechanical work on the joint line increased with the pin angle and larger stir zone forms. The simulation results show that in the angled pin tool, more than 26% of the total heat is produced by the pin. Meanwhile, in other cases, the total heat produced by the pin was near 15% of the total generated heat. The thermo-mechanical cycle in the steel zone increased, and consequently, mechanical interlock between base metals increased. The simulation output demonstrated that the frictional heat generation with a tool without a pin angle is higher than an angled pin. The calculation result also shows that the maximum heat was generated on the steel side.

本文研究了销钉角度对AA1100铝合金和St-14低碳钢搅拌摩擦焊（FSW）过程中热量产生和温度分布的影响。采用经过验证的计算流体动力学（CFD）模型来模拟搅拌摩擦焊过程。利用扫描电子显微镜（SEM）研究内部材料的流动情况。模拟结果表明，随着销钉角度和更大搅拌区的形成，焊缝处的机械功增加。模拟结果显示，在带角度销钉工具中，销钉产生的热量占总热量的比例超过26%。同时，在其他情况下，销钉产生的总热量接近总产生热量的15%。钢区域的热机械循环增加，因此，母材之间的机械互锁增加。模拟输出表明，无销钉角度工具产生的摩擦热高于带角度销钉的工具。计算结果还表明，钢侧产生的热量最大。