1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;
2. Nanjing Institute of Advanced Laser Technology, Nanjing 211106, China
With the increasing demand for aircraft performance, structural weight reduction has become an important task in aerospace manufacturing industries. The Al-Li alloy exhibits many excellent performance including light weight, high strength, etc. These noteworthy advantages make it an ideal aerospace lightweight structural material with great development potential. At the same time, laser welding technology is considered as the most effective joining method for aluminum alloys. Nevertheless, the reliability of the welded structure is recognized as a challenge owing to the unique characteristics of the welded Al-Li alloy and the requirements of the civil aircraft industries. In this paper, the special micro-structure and defects in Al-Li alloy laser welded joint are introduced. The formation mechanism and inhibition measures of equiaxed grain along the fusion boundary (EQZ), welding pores, welding cracks and joint softening defects are analyzed.
基金资助:江苏省自然科学基金（SBK2016022015）。
引用本文:
夏令，吴友发，余海松，高雪松，占小红. 铝锂合金激光焊接接头组织与缺陷研究进展[J]. 航空制造技术, 2018, 61(23/24): 77-81.
XIA Ling1, WU Youfa1, YU Haisong1, GAO Xuesong2, ZHAN Xiaohong1. Research Progress on Microstructure and Defects in Al-Li Alloy Laser Welded Joint[J]. Aeronautical Manufacturing Technology, 2018, 61(23/24): 77-81.
2018, 
