In situ Observation of the Phase Transformations in Al-Cu-Li-Ag Alloy and its Laser Weld | Sciact - CRIS-system of Boreskov Institute of Catalysis

In situ Observation of the Phase Transformations in Al-Cu-Li-Ag Alloy and its Laser Weld Full article

Journal

Materials Characterization
ISSN: 1044-5803

Output data

Year: 2025, Volume: 230, Number: Part A, Article number : 115695, Pages count : 16 DOI: 10.1016/j.matchar.2025.115695

Tags

Laser welding, Aluminum‑lithium alloys, Synchrotron radiation, X-ray diffractometry, Transmission electron microscopy, Differential scanning calorimetr

Authors

Vitoshkin Igor ¹ , Malikov Alexandr ¹ , Shmakov Alexandr ² , Mironova Maria ³ , Gutakovskii Anton ⁴ , Batsanov Stepan ⁴

Affiliations

1	Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Institutskaya str., 4/1, Novosibirsk 630090, Russia
2	Synchrotron Radiation Facility SKIF of Boreskov Institute of Catalysis SB RAS, Nikolskiy Ave. 1, Koltsovo 630559, Russia
3	Novosibirsk State University, Pirogova st., 2, 630090 Novosibirsk, Russia
4	Rzhanov Institute of Semiconductor Physics SB RAS, Lavrentyev Ave., 13, Novosibirsk 630090, Russia

This paper presents the results of in situ investigation of Al-Cu-Li-Ag alloy (V-1469) in initial state and after laser welding. The study was performed via synchrotron X-ray diffraction accompanied by transmission electron microscopy and differential scanning calorimetry. The behavior of main strengthening phases T1 (Al2CuLi) and Ω (Al2Cu) were in focus. It was found that they act differently in the initial alloy and in the weld material. The T1 phase was more thermally stable in the initial alloy and decomposed at much higher temperature than in the weld material. The Ω phase doesn’t decompose completely in the initial alloy up to ~600 ◦C due to, presumably, its stabilization after the T1 decomposition. In case of the weld material this phase isn’t present initially but forms after heating and consequent cooling.

Vitoshkin I. , Malikov A. , Shmakov A. , Mironova M. , Gutakovskii A. , Batsanov S.
In situ Observation of the Phase Transformations in Al-Cu-Li-Ag Alloy and its Laser Weld
Materials Characterization. 2025. V.230. NPart A. 115695 :1-16. DOI: 10.1016/j.matchar.2025.115695 OpenAlex

Submitted:	Jul 23, 2025
Accepted:	Oct 20, 2025
Published online:	Oct 24, 2025
Published print:	Dec 25, 2025

OpenAlex:

W4415445477

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