doi: 10.52899/24141437_2025_04_523
UDK: 621.791.72

Structural Analysis of Welded Joint Made by Laser Welding of VT6 Titanium Alloy With 1545 Aluminum Alloy

Ахметов А. Д., Наумов С. В., Кульпин Е. Д., Степанов Н. Д.
Article language:
Citation Link: Kul’pin ED, Аkhmetov AD, Stepanov ND, Naumov SB. Structural Analysis of Welded Joint Made by Laser Welding of VT6 Titanium Alloy With 1545 Aluminum Alloy. Transactions of the Saint Petersburg State Marine Technical University. 2025;4(4):523–534. DOI: 10.52899/24141437_2025_04_523 EDN: PFGJYL

Annotation

BACKGROUND: Studies of laser welding of titanium and aluminum is important for development of new materials and technologies, which in turn may improve the performance of end products in various industries, including automotive, aviation, and shipbuilding. However, laser welding of these materials is a complicated process due to differences in their physical and chemical properties. The study included a structural analysis of a welded joint of titanium and aluminum alloys and an analysis of its mechanical properties. The processing included welding in different modes. AIM: To analyze the structure of a welded joint made by laser welding of VT6 titanium alloy with 1545 aluminum alloy. METHODS: In this study, VT6 titanium alloy and 1545 aluminum alloy were used as the main welded materials. Rechflot arc augmented laser welding system and 3200 × 6000 mm workpieces were used for welding. RESULTS: The study identified key aspects affecting the mechanical properties and reliability of joints. Analysis of the resulting microstructures showed that laser welding allows to achieve a high degree of uniformity and density of the weld; however, it is required to consider the effect of thermal conditions and weld geometry on intermetallic joints. CONCLUSION: Formation of specific phases in the welding area requires further study to improve welding technology and the performance of joints. This study confirms that laser welding can be used to join Ti-Al systems, unveiling new possibilities to produce lightweight and high-strength structures in the aviation and space industries. Thus, to achieve higher strength and durability of joints, it is required to continue a deep analysis of the influence of various factors on welding processes, including the selection of suitable additives and processing conditions Keywords: laser welding; VT6 titanium alloy; 1545 aluminum alloy; welded joint; microstructure

Bibliography

BACKGROUND: Studies of laser welding of titanium and aluminum is important for development of new materials and
technologies, which in turn may improve the performance of end products in various industries, including automotive, aviation,
and shipbuilding. However, laser welding of these materials is a complicated process due to differences in their physical
and chemical properties. The study included a structural analysis of a welded joint of titanium and aluminum alloys and
an analysis of its mechanical properties. The processing included welding in different modes.
AIM: To analyze the structure of a welded joint made by laser welding of VT6 titanium alloy with 1545 aluminum alloy.
METHODS: In this study, VT6 titanium alloy and 1545 aluminum alloy were used as the main welded materials. Rechflot arc
augmented laser welding system and 3200 × 6000 mm workpieces were used for welding.
RESULTS: The study identified key aspects affecting the mechanical properties and reliability of joints. Analysis of the resulting
microstructures showed that laser welding allows to achieve a high degree of uniformity and density of the weld; however, it is
required to consider the effect of thermal conditions and weld geometry on intermetallic joints.
CONCLUSION: Formation of specific phases in the welding area requires further study to improve welding technology and
the performance of joints. This study confirms that laser welding can be used to join Ti-Al systems, unveiling new possibilities
to produce lightweight and high-strength structures in the aviation and space industries. Thus, to achieve higher strength and
durability of joints, it is required to continue a deep analysis of the influence of various factors on welding processes, including
the selection of suitable additives and processing conditions