HIT News(School of Materials Science and Engineering/ text) Backed by the National Natural Science Foundation of China and the Young Scientists Studio in HIT, the team pioneered by Prof. Huang Yongxian and Prof. Jian Cao from the State Key Laboratory of Advanced Welding and Connection of HIT published a long paper entitled Recent progress on control strategies for inherent issues in friction stir weldinginProgress in Materials Science(Impact Factor 31.560), a famous international journal in the field of material science research. This is the first time that our institute has published a paper in this field in this journal. Dr. Meng Xiangchen, a young teacher from the School of Materials Science and Engineering, is the first author; Prof. Huang Yongxian and Prof. Jian Cao are the co-communication authors, and HIT is the first unit. The authors also include Dr. Shen Junjun and Prof. Jorge F. dos Santos of the Helmholtz Institute of Materials in Germany.
The paper published this time has 74 pages and 349 references, including 85 illustrations and 8 data tables, covering the relevant research results of the team on this topic in the past ten years. Based on the achievements made by the friction stir welding team of our institute and scholars at home and abroad in the inherent mode and control strategy of friction stir welding, the papersystematically analyzed, reviewed and summarizedthe development status of this research field, then prospectedits development direction. The publication of this paper will further enhance the influence of the State Key Laboratory of Advanced Welding and Connection in the international academic field.
Under the environment of energy conservation, emission reduction and manufacturing powerhouse, improving energy efficiency ratio based on lightweight design has become a common goal in aviation, aerospace, vehicles, ships and other fields. Developing welding technology with large load capacity and high reliability is an effective way. Friction stir welding, as a solid phase welding method, has the advantages of low welding temperature, severe plastic deformation, high joint strength, small residual stress and deformation, green and no pollution, etc. With the support of the National Natural Science Foundation, the General Assembly Pre-research, the Equipment Pre-research, the Commercial Aircraft Innovation Fund, the Young Scientists Studio Construction Project of our school and the horizontal cooperation projects of enterprises such asChina Academy of Launch Vehicle Technology, the Second Research Institute of China Aerospace Science and Industry Corporation, Shanghai Academy of spaceflight Technology, Shanghai Aircraft Manufacturing Co., Ltd, Tangshan Locomotive & Rolling Stock Co., Ltd and AVIC Harbin Aircraft Industry Group Co., Ltd, the team focus on the three basic problems of full friction stir welding manufacturing for complex structures, large load-bearing shape control and lightweight design. The application of basic science, systematic and in-depth research has been carried out on the co-control of weld shape, the evolution of microstructure and property regulation, the bearing capacity and damage behavior of joints in complex environment. The methods of self-supporting, non-thinning, filling and rolling friction stir welding are proposed, which break through the technical bottlenecks of complex structure, solid proximity and other strong repair, non-thinning weld formation and so on, and provide important technical support and reserve for reliable welding of key components in major projects.
The team's related research results have published more than 150 academic papers in domestic and foreign journals such as Composites Part A and Composites Part B, Journal of Materials Science and Technology, Materials Science and Engineering A, and Journal of Welding. Sixty-three invention patents have been authorized, gradually realizing the transformation from process-based innovation to principle-based innovation. Now it has the turnkey engineering capability of “research and development-equipment-technology-service”. As an important support, relevant achievements have won provincial, ministerial and national science and technology awards.