Special Features of the Structure of Laser-Welded Joints of Dissimilar Alloys Based on Titanium and Aluminum

Никулина, А. А.; Smirnov, A. I.; Turichin, Gleb; Klimova-Korsmik, Olga; Babkin, Konstantin

doi:10.1007/s11041-017-0185-y

Cited by 13 publications

(5 citation statements)

References 20 publications

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“…Through the results so far, and in accordance with other studies, it is clear that the characteristics, size, distribution and morphology of the phases formed in the laser welding process of the Al/Ti joint is administered by the coefficient of diffusion, welding energy, beam offset, and distance to the Al/Ti [48] interface. The diffusion coefficient of Ti in Al is 2.15 x 10-8 m2 / s [49] and it was observed that the phenomenon can occur at a relatively low temperature, around 600 ºC [50].…”

Section: Formation Of Intermetallic Compoundssupporting

confidence: 85%

Improvement weldability of dissimilar joints (Ti6Al4V/Al6013) for aerospace industry by laser beam welding

Ribeiro

Siqueira²,

Lima³

et al. 2021

Int J Adv Manuf Technol

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The discovery of new metal alloys and the technological advancement in welding processes are key resources for the aerospace industry to obtain cost reduction and better reliability. Thus, welded joints of dissimilar materials such as aluminum and titanium alloys has been explored due to its combined low density and high mechanical performance. Otherwise, welding of dissimilar metals may present deleterious factors to the welded joint as the formation of intermetallic and/or brittle second phase and residual stress. This project investigates the weldability of dissimilar welded joint (Al6013/Ti-6Al-4V) by Laser beam welding. The approach will be done in terms of mechanical properties and microstructural characterization. For this purpose, optimal laser offset from the joint line and the related heat input has been found. It was observed that offset controls the amount of the intermetallic compound layer in the fusion zone. Large pores were observed on the Al side of the weld metal when the offset is zero. The microstructure on the aluminum side consisted of -Al grains and the dispersed precipitates. Heat input and offset also influenced in the volumetric fraction of the precipitates. Martensite α ′ and secondary acicular α phase was found in the titanium side. Furthermore, intermetallic compound of TiAl base phase such as TiAl, Ti3Al4, and Ti2Al3 was formed. Tensile strength of welded joint was 60% of the Al alloy. In addition, for the same offset and higher heat input, there was an increase in the hardness of the interface.

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Section: Formation Of Intermetallic Compoundssupporting

confidence: 85%

Improvement weldability of dissimilar joints (Ti6Al4V/Al6013) for aerospace industry by laser beam welding

Ribeiro

Siqueira²,

Lima³

et al. 2021

Int J Adv Manuf Technol

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“…Nikulina A.A. et al in [ 64 ] use significantly higher laser welding speeds (70–100 mm/s) in comparison with the above works (11–17 mm/s) [ 45 , 46 , 47 , 48 ]. The effect of the welding speed and the level of heat input when butt welding the titanium alloy VT6S (3 mm thick) and aluminum alloy AA1424 (4 mm thick) was investigated.…”

Section: Laser Welding Of Aluminum Alloys To Titanium Alloysmentioning

confidence: 99%

“…From the above, it follows that in [ 60 , 61 , 62 , 63 ], experimenters used low laser welding speeds of 11–17 mm/s, and in works [ 17 , 20 , 64 , 65 , 66 ], the used welding speeds were tens of times higher (100–833 mm/s). At the same time, as a result of a higher laser beam offset on the aluminum alloy, the IMC is comparable in both cases (2–6 μm).…”

Section: Laser Welding Of Aluminum Alloys To Titanium Alloysmentioning

confidence: 99%

A Review: Laser Welding of Dissimilar Materials (Al/Fe, Al/Ti, Al/Cu)—Methods and Techniques, Microstructure and Properties

Kuryntsev

2021

Materials

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Modern structural engineering is impossible without the use of materials and structures with high strength and low specific weight. This work carries out a quantitative and qualitative analysis of articles for 2016–2021 on the topic of welding of dissimilar alloys. It is found that laser welding is most widely used for such metal pairs as Al/Fe, Al/Ti, and Al/Cu. The paper analyzes the influence of the basic techniques, methods, and means of laser welding of Al/Fe, Al/Ti, and Al/Cu on the mechanical properties and thickness of the intermetallic compound (IMC). When welding the lap joint or spike T-joint configuration of Al/Fe, it is preferable to melt the steel, which will be heated or melted, by the laser beam, and through thermal conduction, it will heat the aluminum. When welding the butt-welded joint of Al/Fe, the most preferable is to melt the aluminum by the laser beam (150–160 MPa). When welding the butt-welded joint of Al/Ti, it is possible to obtain the minimum IMC and maximum mechanical properties by offsetting the laser beam to aluminum. Whereas when the laser beam is offset to a titanium alloy, the mechanical properties are 40–50% lower than when the laser beam is offset to an aluminum alloy. When lap welding the Al/Cu joint, under the impact of the laser beam on the aluminum, using defocusing or wobbling (oscillation) of a laser beam, it is possible to increase the contact area of electrical conductivity with the tensile shear strength of 95–128 MPa.

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“…The works of the other authors are investigated [7,8], and they shows that in the samples the α/α' -phase is also formed after selective laser melting (SLM), but after the HIP the microstructures are converted from an acicular α′-martensite structure into a lamellar α+β phase in Ti-6Al-4V samples [9].…”

Section: Introductionmentioning

confidence: 99%

Structure and Phase Composition of Ti-6Al-4V Samples Produced by Direct Laser Deposition

Shalnova

Panova

Buczak

2019

KEM

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In this article has carried out X-ray phase analysis of the samples obtained using direct laser deposition. Two groups of samples were studied: the first one was obtained with oscillation of laser radiation, the second one – without. The investigations have shown that in the process of direct laser deposition, the α+β phase is formed from a Ti-6Al-4V titanium alloy with oscillation of laser radiation.

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Special Features of the Structure of Laser-Welded Joints of Dissimilar Alloys Based on Titanium and Aluminum

Cited by 13 publications

References 20 publications

Improvement weldability of dissimilar joints (Ti6Al4V/Al6013) for aerospace industry by laser beam welding

Improvement weldability of dissimilar joints (Ti6Al4V/Al6013) for aerospace industry by laser beam welding

A Review: Laser Welding of Dissimilar Materials (Al/Fe, Al/Ti, Al/Cu)—Methods and Techniques, Microstructure and Properties

Structure and Phase Composition of Ti-6Al-4V Samples Produced by Direct Laser Deposition

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