期刊
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
卷 35, 期 20, 页码 2230-2248出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/01694243.2021.1882778
关键词
Friction stir welding; 2024-T3 aeronautical aluminum alloy; numerical simulation; multi-field coupling
资金
- National Natural Science Foundation of China [E050402/51105187]
- Innovative Talents Support Program of Colleges and Universities in Liaoning Province
- Open Topics of Firefighting Key Laboratories of the Ministry of Public Security [KF201704]
- Innovation Team Building Project of University of Science and Technology Liaoning [601009830-02]
- Natural Science Foundation Guidance Project in Liaoning Province [2019ZD0277]
Friction stir welding is an effective method for improving the welding quality of 2024-T3 aluminum alloy, with wide application prospects in aerospace and shipbuilding industries. Calculating material physical parameters and establishing numerical models using the CALPHAD method can accurately grasp the transient evolution mechanism of welding, improving welding quality.
2024-T3 aeronautical aluminum alloy is a high-strength hard aluminum alloy, belonging to the Al-Cu-Mg series. It is mainly used for manufacturing various high-load mechanical parts such as aircraft skeletons. 2024-T3 aluminum alloy is difficult to be welded with traditional fusion welding, especially welded with another material such as titanium alloy or copper alloy. The welding quality of 2024-T3 aluminum alloy can be improved effectively by friction stir welding, which is favored in the aerospace and shipbuilding fields. Accurately grasping the welding transient evolution mechanism is the key to improving welding quality. It plays an important role in promoting the application of friction stir welding in industry. In this paper, the material physical parameters that change with the temperature were calculated by using the CALPHAD method, and the numerical model for friction stir welding was established. The transient changes in the temperature and stress field of the workpiece and the load of the stirring head were obtained. The temperature, stress, and strain of the advancing side and retreating side were compared and analyzed. The temperature of the workpiece surface and the stress around the keyhole were revealed. Zeiss Sigma 500 field emission scanning electron microscope was used to perform micro-characterization experiments, and the accuracy of the model was verified by comparing the simulation with the experiment. This research is of considerable significance for accurately revealing the mechanism of friction stir welding.
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