Study of the Evolution of the Phase Composition of Laser Welded Joints of Third-Generation Al–Li Alloys with the Use of Synchrotron Radiation | Sciact - CRIS-system of Boreskov Institute of Catalysis

Study of the Evolution of the Phase Composition of Laser Welded Joints of Third-Generation Al–Li Alloys with the Use of Synchrotron Radiation Full article

Journal

Bulletin of the Russian Academy of Sciences: Physics
ISSN: 1062-8738 , E-ISSN: 1934-9432

Output data

Year: 2024, Volume: 88, Number: S1, Pages: S89-S99 Pages count : 11 DOI: 10.1134/s1062873824708857

Tags

laser welding, aluminum–lithium alloys, synchrotron radiation, mechanical properties

Authors

Malikov A.G. ¹ , Vitoshkin I.E. ¹ , Mironova M.I. ^1,2 , Zavjalov A.P. ^1,3 , Kuper K.E. ^1,3

Affiliations

1	Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
2	Laboratory of Functional Diagnostics of Low-Dimensional Structures for Nanoelectronics, Novosibirsk State University, 630090, Novosibirsk, Russia
3	Synchrotron Radiation Facility—Siberian Circular Photon Source “SKIF,” Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 630559, Koltsovo, Russia

Funding (1)

Russian Science Foundation

23-79-00037

We studied the evolution of the phase composition of laser welded joints before and after heat treatment of 3rd generation Al–Li alloys using synchrotron radiation. The article demonstrates the fundamental role of the alloying elements of copper and lithium in formation of the phase composition of the fusion zone of the weld. It has been established that laser exposure changes the phase composition of the alloy. Namely, low copper contents mainly lead to formation of T2(Al6CuLi3) and T3(Al5CuLi3) phases, the average copper contents form T1(Al2CuLi), T2(Al6CuLi3), T3(Al5CuLi3) phases and the presence of high copper contents results in formation of T1(Al2CuLi) phase at the boundaries of dendrite. Post-heat treatment restores the initial phase composition in the fusion zone. As for the solid solution, the δ'(Al3Li) phase is formed at low copper contents, the δ'(Al3Li) and T1(Al2CuLi) phases are formed at average copper contents, and T1(Al2CuLi) phase is observed at high copper contents. Consequently, this makes it possible to improve the mechanical properties of weld joint specimens to match the numbers of the initial alloy.

Malikov A.G. , Vitoshkin I.E. , Mironova M.I. , Zavjalov A.P. , Kuper K.E.
Study of the Evolution of the Phase Composition of Laser Welded Joints of Third-Generation Al–Li Alloys with the Use of Synchrotron Radiation
Bulletin of the Russian Academy of Sciences: Physics. 2024. V.88. NS1. P.S89-S99. DOI: 10.1134/s1062873824708857 Scopus OpenAlex publication_identifier_short.sciact_skif_identifier_type

Submitted:	Oct 8, 2024
Accepted:	Oct 14, 2024
Published print:	Dec 1, 2024
Published online:	Jan 17, 2025

Scopus:	2-s2.0-85217441644
OpenAlex:	W4406535057
publication_identifier.sciact_skif_identifier_type:	3702

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