Flat friction spot joining of aluminum alloy to carbon fiber reinforced polymer sheets: Experiment and simulation
Flat friction spot joining of aluminum alloy to carbon fiber reinforced polymer sheets: Experiment and simulation
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DOI：
10.1016/j.jmst.2021.08.043
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发表时间：
2022-04-30
影响因子：
10.9
通讯作者：
Fujii, Hidetoshi
中科院分区：
文献类型：
--
作者：
Geng, Peihao;Ma, Ninshu;Fujii, Hidetoshi
铝合金和碳纤维增强聚合物（CFRP）混杂结构结合了两种材料的性能优势，在高端制造领域受到越来越多的关注。采用平面摩擦点焊技术对AA6061-T6合金与CFRP板进行了连接。通过对界面组织特征、焊接缺陷形成及断口形貌的分析，强调了温度分布对接头质量的重要影响。为了全面了解热能的产生和传导过程，建立了三维热力耦合有限元模型。界面温度的特点是不均匀的分布行为，由于不均匀的热分布。在1500 rpm旋转速度和0.1 mm/s切入速度下，顶表面和Al合金与CFRP界面上的峰值温度分别为498 ℃和489 ℃。峰值界面温度在250 rpm下降低至286 ℃，这产生了极小的熔融区域。与切入速度相比，旋转速度是决定接头性能的主要参数，优化旋转速度可以同时实现避免CFRP热分解、足够的熔化持续时间和足够宽的熔化区域。模拟的热历史和熔化区的分布与实验结果一致。研究结果可为异种金属及复合材料的FSJ工艺优化提供一定的指导。(c)2022由Elsevier Ltd代表Journal of Materials Science & Technology编辑部出版。
The Al alloy and carbon fiber reinforced polymer (CFRP) hybrid structures, incorporating the performance advantages of the two materials, have been attracting more attention in high-end manufacturing fields. In the current investigation, the flat friction spot joining (FSJ) was employed in joining the AA6061-T6 alloy and CFRP sheets. The significance of temperature distribution in influencing joint quality was highlighted through analyzing interface microstructural features, weld defect formation as well as fractography. To understand the role of thermal energy generation and conduction in the process comprehensively, a 3D thermal-mechanical coupling finite element model was established. The interfacial temperature was characterized by an uneven distribution behavior due to the inhomogeneous heat distribution. The peak temperatures on the top surface and Al alloy to CFRP interface at 1500 rpm rotational speed with 0.1 mm/s plunging speed were 498 degrees C and 489 degrees C, respectively. The peak interface temperature was reduced to 286 degrees C at 250 rpm, which produced an extremely small melted area. Compared with the plunging speed, rotational speed was found to be the predominant parameter for determining the joint property, which could be optimized to simultaneously realize the avoidance of thermal decomposition of CFRP, the sufficient melting duration time, and the wide enough melted area. Simulated thermal histories and melted area profiles were in agreement with experimental ones. The findings could be utilized to provide some feasible guidance for process optimization of dissimilar FSJ of metals and composites. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.