| LU Ke-feng,YIN Feng-shi,WANG Wen-yu,TENG Tao,FAN Shi-chong,LIU Ya-fan,WANG Hong-qi,ZHU Jian,REN Zhi-qiang.#$NP Research Progress of Defect Control Strategy for Al Alloy Stir Friction Welding Head and Welding Structure[J],52(7):55-79 |
| #$NP Research Progress of Defect Control Strategy for Al Alloy Stir Friction Welding Head and Welding Structure |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.07.005 |
| KeyWord:Al alloy welding friction stir welding welding defects welding of complex components process optimization mechanical properties |
| Author | Institution |
| LU Ke-feng |
School of Mechanical Engineering, Shandong University of Technology, Shandong Zibo , China |
| YIN Feng-shi |
School of Mechanical Engineering, Shandong University of Technology, Shandong Zibo , China |
| WANG Wen-yu |
National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing , China |
| TENG Tao |
Chinese People's Liberation Army Unit 32381, Beijing , China |
| FAN Shi-chong |
School of Mechanical Engineering, Shandong University of Technology, Shandong Zibo , China |
| LIU Ya-fan |
School of Mechanical Engineering, Shandong University of Technology, Shandong Zibo , China |
| WANG Hong-qi |
School of Mechanical Engineering, Shandong University of Technology, Shandong Zibo , China |
| ZHU Jian |
School of Mechanical Engineering, Shandong University of Technology, Shandong Zibo , China |
| REN Zhi-qiang |
National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing , China |
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| Abstract: |
| Compared with steels, Al alloys possess lots of advantages, such as light specific gravity, good plasticity, excellent thermal conductivity, corrosion resistant, etc. Nowadays, more and more products are designed by welding structure of Al alloys and used in the shipbuilding, automobile manufacturing, aerospace and petrochemical industry, presenting unique advantages and significant economic benefits. The welding problems of Al alloys have always been a focus of attention, such as cracks, pores, overburning, etc. As a result, the safety problems severely restrict the industrial application of Al alloys. Friction stir welding (FSW) is a solid-state bonding process. FSW achieves the joining between materials through the generation of frictional heat and strong plastic deformation. At the same time, the stirring head shoulder applies a certain compressive stress to the material to ensure a high-density and defect-free weld. Compared with the traditional fusion welding process, it has the advantages of good joint quality, refined microstructure, excellent fatigue performance, low peak temperature, energy saving, etc. Therefore, FSW is exactly suitable for the welding of Al alloys. |
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