Realizing deep penetration and superior mechanical properties in a titanium alloy thick plate joint via vacuum laser beam welding

Li, F.S.; Wu, L.H.; Zhao, H.B.; Xue, P.; Ni, D.R.; Xiao, B.L.; Ma, Z.Y.

doi:10.1016/j.jmrt.2023.08.059

Cited by 7 publications

(2 citation statements)

References 40 publications

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“…Paper [3] described promising techniques of welding high-strength titanium alloys with (a+β) two-phase structures. Based on the analysis of available research, it was concluded that almost all welding techniques are used for welding titanium alloys.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining the technological parameters of electron-beam welding of high-strength titanium alloys

Fedosov,

Karpovych

2023

EEJET

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It is usually quite difficult to carry out deep penetration of thick-walled products from titanium alloys using conventional welding technologies. In this study, it was proposed to use electron beam welding under high vacuum conditions for the realization of 40 mm thick melting of VT23, VT3-1 alloys. This paper considers the possibility of obtaining high-quality welded joints from high-strength titanium alloys having (a+β) two-phase structures. For the implementation of research works, samples were made from selected materials, samples were welded according to the specified modes, metallographic analysis was performed, and the level of mechanical properties was determined. The research results were verified under laboratory conditions. The technological features of the processes of electron-beam welding of products with a thickness of 40 mm were considered; the parameters affecting the weldability of titanium alloys and their structure were determined. The welded samples were checked by X-ray non-destructive testing, the microstructure of the welds was studied, and the physical and mechanical properties of the welded joints were checked. It was established that a feature of titanium alloys VT3-1, VT23 is the need for heat treatment after welding under the base metal regimes to improve the characteristics of the welded joint. The resulting strength limit of the alloys after heat treatment reached values of 1250 MPa and more, while the impact toughness was at the level of 48–50 J·cm-2. Modeling the welding process has made it possible to ensure the reproducibility of the characteristics of the welded joint at a level close to that of the base metal, to increase the quality indicators of welded joints, and to reduce the time required to test the technology. The studies of simulator samples showed compliance of the quality of welded joints with the predefined parameters.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining the technological parameters of electron-beam welding of high-strength titanium alloys

Fedosov,

Karpovych

2023

EEJET

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“…Many advanced welding technologies such as friction stir welding, hybrid laserarc welding (HLAW) [11], electron beam welding (EBW) [12], and laser beam welding (LBW) [13,14] have attracted attention to join titanium alloy. LBW, as one of these techniques, can provide favorable results for welding titanium alloy due to its rapid processing capability and precision [15][16][17]. Zhang et al [18] investigated whether the residual stress distribution zone of laser beam-welded titanium alloy joints was lower compared to the traditional fusion welded joints.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Weldability for Microstructures in Laser-Welded Near-α Titanium Alloy: Insights on Mechanical Properties

Zhang,

Cong,

Zeng

et al. 2024

Metals

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With the development of lightweight aerospace structures, the use of the high-quality and efficient laser welding of near-α titanium alloys has received widespread attention and favor thanks to its superior comprehensive performance. The welding experiment of 3 mm thick TA15 titanium alloy was carried out by YAG laser welding, and the material weldability, microstructure, microhardness, and mechanical properties of welded joints were systematically studied. The results indicated that laser welding of TA15 titanium alloy can produce well-formed welded joints without defects such as cracks and porosity. The welded metal used was a typical basket-weave microstructure composed of a large number of α′ martensitic phases and a small number of high-temperature residual β phases, and the heat-affected zone was a staggered arrangement of undissolved α phase and needle-like α′ martensite. The microhardness of the welded joint showed a hump distribution, and the hardness of WM fluctuated between 410 and 450 HV since the martensitic transformation occurred during the solidification of the weld under thermal cycling, and the β phase changed to the needle-like α′ phase. The tensile test indicated that the fracture position was located in the base metal area, and the fracture morphology showed the equiaxial dimple morphology of different sizes in a ductile fracture mode. The welded metal had the lowest impact performance (average value of 5.3 J) because the weld area was predominantly coarse α′ martensite. This experiment conducted systematic, in-depth, and extensive research on welding processes, hardness, tensile, impact, and fracture mechanisms. Based on the special product applications in the aerospace field, it was more targeted and conducive to promoting the application of the welding process in this material.

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Optimization of hot deformation parameters for multi-directional forging of Ti65 alloy based on the integration of processing maps and finite element method

Zhu,

Yang,

Gao

et al. 2024

Journal of Materials Research and Technology

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Realizing deep penetration and superior mechanical properties in a titanium alloy thick plate joint via vacuum laser beam welding

Cited by 7 publications

References 40 publications

Determining the technological parameters of electron-beam welding of high-strength titanium alloys

Determining the technological parameters of electron-beam welding of high-strength titanium alloys

Tailoring Weldability for Microstructures in Laser-Welded Near-α Titanium Alloy: Insights on Mechanical Properties

Optimization of hot deformation parameters for multi-directional forging of Ti65 alloy based on the integration of processing maps and finite element method

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