Effect of TIG-Welding on the Structure and Mechanical Properties of the Pseudo-β Titanium Alloy VT19 Welded Joints

Akhonin, S.V.; Belous, V.Yu.; Berezos, V.A.; Selin, R.V.

doi:10.4028/www.scientific.net/msf.927.112

Cited by 16 publications

(6 citation statements)

References 18 publications

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“…For this research, two types of TIG-welding were used: standard fusion TIG welding and TIG welding on the thin flux layer. For standard fusion TIG welding, the tungsten electrode is not located below the surface of the weld metal, with the pre-set arc length approximately 0.5...1 mm [22]. Welding modes are selected to achieve complete fusion of the base metal as the arc progresses.…”

Section: Research Methods and Materialsmentioning

confidence: 99%

Effect of TIG-Welding on the Structure and Mechanical Properties of Low-Cost Titanium Alloy Ti-2.8Al-5.1Mo-4.9Fe Welded Joints

Akhonin,

Belous,

Selin

et al. 2023

MSF

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Titanium alloys are widely used in aerospace, automotive, biomedical and marine engineering due to their good hot and cold processing properties, fracture toughness, high specific strength and good deformability. Nevertheless, titanium is also characterized by very high production costs, which are approximately 6 times and 30 times higher, respectively, in comparison to those to obtain the same quantity of aluminum or steel relegating titanium to high demanding sectors. One possible way to reduce the cost of titanium is to use cheaper alloying elements instead of vanadium or niobium to stabilize the body-centred-cubic (B.C.C) β-phase. TIG-welding of high-strength low-cost pseudo-β titanium alloys is complicated, primarily due to the high content of alloying elements, such as iron, molybdenum, as well as the use of oxygen as an alloying elements. By the correct choice of welding modes in most cases, it is possible to obtain welded joints of high-strength pseudo-β titanium alloys with good microstructure and mechanical properties. To study the influence of TIG welding on the structure and mechanical properties of low-cost titanium alloy Ti–2.8Al–5.1Mo–4.9Fe, two types of TIG-welding chosen: standard fusion TIG welding and TIG welding on the thin flux layer.

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Section: Research Methods and Materialsmentioning

confidence: 99%

Effect of TIG-Welding on the Structure and Mechanical Properties of Low-Cost Titanium Alloy Ti-2.8Al-5.1Mo-4.9Fe Welded Joints

Akhonin,

Belous,

Selin

et al. 2023

MSF

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“…Additionally, the microstructure of the fusion zone (FZ) was composed of coarse β grains and acicular α and α' phases. Akhonin et al [15] investigated the influence of TIG welding on the microstructure and mechanical properties of a VT19 titanium alloy welded joint. Hu et al [16] demonstrated that the HAZ and FZ of the TC17 titanium alloy TIG welded joint are composed primarily of α' martensite, acicular α, and Widmanstätten α + β, respectively.…”

Section: Introductionmentioning

confidence: 99%

An Investigation into the Microstructures and Mechanical Properties of a TIG Welding Joint in Ti-4Al-2V Titanium Alloy

Chen,

Liu,

Zhang

et al. 2024

Metals

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The Ti-4Al-2V (wt. %) titanium alloy has garnered widespread applications across diverse fields due to its exceptional strength-to-weight ratio, high toughness, specific strength, and corrosion resistance. The welding of Ti-4Al-2V titanium alloy components is often necessary in manufacturing processes, where the reliability of a welded joint critically influences the overall service life of these components. Consequently, a comprehensive understanding of the welded joint’s microstructure and mechanical properties is imperative. In this study, Ti-4Al-2V titanium alloy was welded using multi-layer and multi-pass TIG welding techniques, and a detailed examination was conducted to analyze the microstructure and grain morphology of each microzone of the welded joint. The results revealed the presence of an initial α phase and a secondary lamellar α phase in the heat affected zone (HAZ). Meanwhile, the fusion zone (FZ) primarily comprised a coarse secondary α phase and a small amount of an acicular martensitic α’ phase. Both the recrystallization zone and the superheated zone exhibited a distinct preferred orientation, with grains smaller than 10 μm accounting for 65.9% and 55.1%, respectively. To assess the mechanical properties of the various microzones and the typical microstructure within the welded joint, nanoindentation tests were performed. The results indicated that the recrystallization zone possessed a higher nanohardness (3.753 GPa) than the incomplete recrystallization zone (3.563 GPa) and the superheated zone (3.48 GPa). Among all the microzones, the FZ exhibited the lowest average nanohardness (3.058 GPa). Notably, the basket-weave microstructure demonstrated the highest average nanohardness, reaching 3.93 GPa. This was followed by the fine-grain microstructure, which possessed a slightly lower nanohardness. The Widmanstätten microstructure, on the other hand, exhibited the lowest nanohardness among the three microstructures within the HAZ. Therefore, the basket-weave microstructure stands out as the most desirable microstructure to achieve in the welded joint. In summary, this study provides a comprehensive characterization and analysis of the microstructure and properties of Ti-4Al-2V titanium alloy TIG welds, aiming to contribute to the optimization of the TIG welding process for Ti-4Al-2V titanium alloy.

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“…It is used to create products for construction purposes, railway cars, frame structures in rocket building, etc. As compared to continuous welding [24][25][26][27][28][29][30][31][32], spot welding [6,10,19] provides minimal deformations of structures and allows manufacture them with a high accuracy. The use of spot welding provides high efficiency and quality of performed works and saves time and material resources due to reduction of efforts to straighten products, required because of their buckling after welding and decrease in electric power consumption.…”

Section: Introductionmentioning

confidence: 99%

Laser Spot Welding a Three-Layered Panel in Different Spatial Positions

Bernatskyi

Berdnikova

Kushnarova

et al. 2022

SSP

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The aim of the work is a comparative analysis of structural features and mechanical characteristics of spot welded joints of thin-sheet stainless steels 03Х11Н10М2T and 12Х18Н10Т, produced by laser welding in different welding positions. The change in the welding position from vertical to flat allowed extend the ranges of variation of welding modes from about ±5% to about ±10%, at which it is possible to produce a welded joint with satisfactory shape and mechanical characteristics. Higher strength is typical for welded joints obtained in a flat position. It also concerns the maximum value of the shear stress, which for the flat position is higher by approximately 10%, and the average value, which is higher by approximately 24%. In addition, the results of mechanical shear tests of these joints have a significantly lower dispersion.

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Effect of TIG-Welding on the Structure and Mechanical Properties of the Pseudo-β Titanium Alloy VT19 Welded Joints

Cited by 16 publications

References 18 publications

Effect of TIG-Welding on the Structure and Mechanical Properties of Low-Cost Titanium Alloy Ti-2.8Al-5.1Mo-4.9Fe Welded Joints

Effect of TIG-Welding on the Structure and Mechanical Properties of Low-Cost Titanium Alloy Ti-2.8Al-5.1Mo-4.9Fe Welded Joints

An Investigation into the Microstructures and Mechanical Properties of a TIG Welding Joint in Ti-4Al-2V Titanium Alloy

Laser Spot Welding a Three-Layered Panel in Different Spatial Positions

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