Study of the Effect of Phase Composition of Al-Cu-Li Alloy Welded Joints on Their Mechanical Properties
A. G. Malikov1, I. E. Vitoshkin1, E. V. Karpov1,2, A. P. Zavyalov1,3, K. V. Zakharchenko1,2
1Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
2Lavrentyev Institute of Hydrodynamics SB RAS, Novosibirsk, Russia
3Shared Research Facility Center “Siberian Synchrotron and Terahertz Radiation Center,” Institute of Catalysis SB RAS, Koltsovo, Russia
Keywords: laser welding, fiber laser, synchrotron radiation, structural-phase state, cyclic, dynamic, and static characteristics
Abstract
Using a fiber laser and post-weld heat treatment, high-strength laser-welded joints of an Al-Cu-Li alloy were produced. Synchrotron transmission studies were used to analyze the structural-phase state of the weld seam before and after treatment. Data on the structural and phase composition of the weld seam as a three-dimensional volume were obtained. The influence of heat treatment on the fatigue resistance of Al-Cu-Li alloy laser-welded joints was studied. Static mechanical tests of the laser-welded joints were carried out at normal, elevated, and reduced temperatures to determine the strength and deformation characteristics of the Al-Cu-Li system. Dynamic tests of welded joints of the Al-Cu-Li system under impact bending were performed using the Charpy method.
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