Laser welding of Ti6Al4V titanium alloys

Akman, Erhan; Demir, A.; Canel, Timur; Sınmazçelik, Tamer

doi:10.1016/j.jmatprotec.2008.08.026

Cited by 352 publications

(191 citation statements)

References 24 publications

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“…These grains may have originated from the near HAZ adjacent to the fusion boundary during solidification [11]. The grain structures of Ti64 welds showed the presence of a small amount of acicular α, a larger amount of α-prime in the HAZ and α-prime covering the entire FZ [9,11]. Huiquang et al [12] reported columnar grains in the FZ.…”

Section: α + β Alloy (Ti6al4v)mentioning

confidence: 98%

“…Weldability of Ti6Al4V (Ti64) has been investigated by various researchers. Akman et al [9] investigated a laser welding of Ti64 and suggested a high cooling rates caused the formation of α-prime in the FZ and HAZ region. While the FZ was predominantly occupied by α-prime (martensite), the HAZ consisted of α-prime (martensite) and acicular α.…”

Section: α + β Alloy (Ti6al4v)mentioning

confidence: 99%

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Welding of titanium alloys

et al. 2017

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Abstract. This article briefly summarises previous reports as well as some recent results on welding of various titanium alloys. Titanium is available in a wide range, hence, their properties and characteristics (including welding characteristics) may also varied significantly. The alloys studied represented three major areas; they are (1): unalloyed or commercially pure titanium (CP Ti), (2): near α and α+β alloys, and (3): β alloys. From our preliminary results, it can be reported that the structure of fusion zone (FZ) and heat affected zone (HAZ) of alloys from area (1) may change but their hardness remained, arguably, the same as the as-received material. Alloys from area (2) showed an increase in hardness in the FZ and HAZ areas due to the formation of α-prime or martensite, while alloys from area (3) experienced a reduction in hardness associated with dissolution of α phase leaving only retained β in the FZ. Further investigations are required to confirm these findings. Such information are very useful so that appropriate post welding heat treatment (PWHT) can be applied to improve their properties and performance.

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Section: α + β Alloy (Ti6al4v)mentioning

confidence: 98%

Section: α + β Alloy (Ti6al4v)mentioning

confidence: 99%

Welding of titanium alloys

et al. 2017

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“…A laser beam is a very concentrated energy source which could provide a high power density [4]. It has been demonstrated by lots of studies that laser beam welding (LBW) has considerable flexibility for joining titanium alloys [5], so LBW is widely applied in Ti-alloy tailor welded blank production [6]. Superplastic forming (SPF) is an efficient method to fabricate the complex Ti-alloy components [7].…”

Section: Introductionmentioning

confidence: 99%

Deformation behaviour of laser-welded tube blank of TA15 Ti-alloy for gas forming at elevated temperature

Wang

Liu

Yuan

2015

MATEC Web of Conferences

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Abstract. Deformation behaviour of laser-welded tube blank of TA15 Ti-alloy at elevated temperature was investigated by both hot tensile tests and high pressure gas forming(HPGF). The hot tensile tests were carried out with four different specimens at 800 • C with an initial strain rate of 1.00×10 −2 s −1 and HPGF test was performed at 800 • C with a constant pressure of 9.5MPa. The tensile results show that base material with equiaxed microstructure exhibited good formability and grain boundary sliding (GBS) accompanied with dynamic recrystallization (DRV) was the main deformation mechanism. However, because the weld bead has coarse columnar grains with fine acicular in the matrix, when the loading direction is parallel with the weld bead, the fine acicular transformed into thicker lamella and the aspect ratio decreased greatly, and voids formed along the initial coarse grain boundaries. When the loading direction is vertical with the weld bead, the welded materials deformed little and the lamella structure thickened obviously after deformation. HPGF tests demonstrate that the laser-welded TA15 tube had a very good formability at 800 • C, and the maximum bulging ratio was as high as 77.4%.

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“…There are interfaces between the zones that may be clear or blurred. The presence of such boundaries is typical of welding by concentrated energy flows [4]. When describing the weld structures for initial microcrystalline and submicrocrystalline states of the Grade 2 titanium alloy, three zones can be identified as well ( Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In this context, laser welding is the most frequently discussed technology [1][2][3][4]. Its advantage is the possibility of welding in the atmosphere rather than in vacuum as in the case of electron-beam welding [5,6].…”

Section: Introductionmentioning

confidence: 99%

Features of the structural phase state of a weld produced by electron-beam welding in the submicrocrystalline grade 2 titanium alloy

et al. 2018

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Abstract. This paper presents the results of structural studies for a welded joint of the Grade 2 titanium alloy in submicrocrystalline and microcrystalline states produced by electron beam welding when joining 2-mm-thick plates. Microhardness distribution patterns of the Grade-2 titanium alloy in micro-and submicrocrystalline states are identified in the weld zone and heat-affected zone. These patterns reflect a difference in structural phase states. It is assumed that one of the key factors affecting both the structural state and microhardness distribution in the weld zone and heat-affected zone during electron-beam welding is high concentration of oxygen atoms embedded into the crystal lattice of -Ti-based solid solution.

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Laser welding of Ti6Al4V titanium alloys

Cited by 352 publications

References 24 publications

Welding of titanium alloys

Welding of titanium alloys

Deformation behaviour of laser-welded tube blank of TA15 Ti-alloy for gas forming at elevated temperature

Features of the structural phase state of a weld produced by electron-beam welding in the submicrocrystalline grade 2 titanium alloy

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