EFFECT SINGLE-STAGE AND THREE-STAGE AGING TREATMENT ON THE MICROSTRUCTURE, PHASE COMPOSITION, AND MECHANICAL PROPERTIES OF LASER-WELDED JOINT AL-CU-LI ALLOY

EFFECT SINGLE-STAGE AND THREE-STAGE AGING TREATMENT ON THE MICROSTRUCTURE, PHASE COMPOSITION, AND MECHANICAL PROPERTIES OF LASER-WELDED JOINT AL-CU-LI ALLOY Full article

Journal

WELDING IN THE WORLD
ISSN: 0043-2288

Output data

Year: 2025, Volume: 69, Pages: 1915-1939 Pages count : 25 DOI: 10.1007/s40194-025-02016-3

Tags

Fiber laser, welding · Al-Cu-Li alloy · Post-weld heat treatment · Synchrotron radiation · Transmission electron microscopy · Microstructure · Phase composition · Mechanical properties

Authors

Malikov Alexandr ¹ , Mironova Maria ^1,4 , Vitoshkin Igor ¹ , Beglyarov Egor ¹ , Gertsel Ilya ^1,4 , Karpov Evgeniy ^1,2 , Zakharchenko Kirill ^1,2 , Zavyalov Alexey ^1,3

Affiliations

1	Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch Russian Academy of Sciences
2	Lavrentyev Institute of Hydrodynamics Siberian Branch Russian Academy of Sciences
3	Budker Institute of Nuclear Physics of Siberian Branch Russian Academy of Sciences
4	Novosibirsk State University

Funding (1)

Российский научный фонд

23-79-00037

To this day, the structural strength of laser-welded joints of Al-Li alloys made with a fber laser has not been thoroughly studied. In this research, high-strength laser-welded joints of Al-2.7Cu-1.8 alloy were obtained using a fber laser followed by post-weld heat treatment. The laser-welding process parameters were optimized, including welding speed, radiation power, and location of the focal spot. In addition, the infuence of these parameters on the microstructure of the welded joints has been studied. After welding, the welded joints were heat treated (PWHT) in two modes to achieve optimal mechanical properties. Changes in the structural and phase composition of the weld material before and after PWHT were examined using synchrotron difraction and transmission electron microscopy. The obtained research results have shown that during laser welding, copper-containing phases formed at the boundary of dendrites in the weld material, which leads to a reduction in strength. The process of post-weld heat treatment (PWHT) has led to the restoration of the phase composition in the material of the weld. The cyclic (fatigue strength), dynamic (crack strength), and static (yield strength and ultimate tensile strength) properties of laser-welded joints after PWHT have been studied. It has been observed that PWHT using mode 1 allows to achieve maximum fatigue and dynamic properties, while PWHT using mode 2 results in achieving maximum static properties at various temperatures.

Malikov A. , Mironova M. , Vitoshkin I. , Beglyarov E. , Gertsel I. , Karpov E. , Zakharchenko K. , Zavyalov A.
EFFECT SINGLE-STAGE AND THREE-STAGE AGING TREATMENT ON THE MICROSTRUCTURE, PHASE COMPOSITION, AND MECHANICAL PROPERTIES OF LASER-WELDED JOINT AL-CU-LI ALLOY
WELDING IN THE WORLD. 2025. V.69. P.1915-1939. DOI: 10.1007/s40194-025-02016-3 WOS Scopus РИНЦ OpenAlex

Submitted:	Sep 21, 2024
Accepted:	Mar 14, 2025
Published print:	Mar 22, 2025

Web of science:	WOS:001449808700001
Scopus:	2-s2.0-105000743485
Elibrary:	82221215
OpenAlex:	W4408764583

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