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of the original manuscript:Vaidya, W.V.; Horstmann, M.; Ventzke, V.; Petrovski, B.; Kocak, M.; Kocik, R.; Tempus, G.: AbstractDissimilar welds of aluminium alloy AA6056 and titanium alloy Ti6Al4V were produced by a novel technique. AA6056 sheet was machined at one end to a U-slot shape, enabling the intake of the Ti6Al4V sheet. The Al-alloy U-slot was then butt welded by split laser beam without using a filling wire, thus making a weld by melting only the Al-alloy.Thereby the intermetallic brittle phase TiAl 3 formed at the weld interface and affected mechanical properties. As a continuation of the previous work, the joint design was modified by chamfering Ti6Al4V to reduce the formation of interfacial TiAl 3 . It is shown in this work how this seemingly insignificant joint modification has refined microstructure and increased hardness and strength. The most impressive feature was the improved resistance to fatigue crack propagation whereby the fracture type in the fusion zone of AA6056 adjacent to the weld interface changed from partially intercrystalline to completely transcrystalline. Possible metallurgical processes leading to the property improvements are discussed.

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“…Aluminium-titanium joints can be produced by different techniques [1][2][3][4]15,[20][21][22][23][24][25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

“…Techniques such as brazing [20], friction welding [21,22], diffusion bonding [23,24] or explosive welding [25] are due to form and size restrictions unsuitable for the seat track, (see Fig. 1), which, when realized, is going to be a long length linear weld (up to a few meters).…”

Section: Introductionmentioning

confidence: 99%

Improving interfacial properties of a laser beam welded dissimilar joint of aluminium AA6056 and titanium Ti6Al4V for aeronautical applications

et al. 2010

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“…As far as dissimilar material welding of metals or alloys with large gap in the melting point and flow stress, like Al-Ti and Al-SS, or reactive pairs, like Al-Mg, are concerned, controlling the formation of intermetallic particles is crucial as they have adverse effects on weld metal properties. [23][24][25][26][27][28][29] In such situations the effect of material flow and intermixing of the materials in advancing and retreating side will be important. Formation of intermetallic compounds depends on temperature, time and concentration of the constituents.…”

Section: Resultsmentioning

confidence: 99%

Positional dependence of material flow in friction stir welding: Analysis of joint line remnant and its relevance to dissimilar metal welding

Kumar

Kailas

2010

Science and Technology of Welding and Joining

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Understanding material flow in friction stir welding is important for production of sound dissimilar metal welding that control the intermixing of two alloys being welded and consequent formation of new constituents which influences the weld properties. In the present experimental investigation material flow patterns are visualised using dissimilar and similar aluminium alloys using a simple innovative experiment. The experimental results reveal that only a portion of material transported from the leading edge undergoes chaotic flow and the remaining is deposited systematically in the trailing edge of the weld. Using this information it is shown that the formation of a friction stir welding defect, joint line remnant, does not occur only when the weld interface is on the advancing side. The material flow visualisation study has been utilised to analyse the mechanism of weld formation and its usefulness in improving fatigue properties and for dissimilar metal welds.

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“…Friction stir welding of dissimilar alloys and the improvement of joint quality was reported by Suhuddin et al [2]. The AA6061/Ti6Al4V dissimilar laminates by single-shot explosive-welding process was produced by Ege and Inal [3]. By using brazing, Song et al [4] and Yang et al [5] pointed out the possibility of dissimilar joining of Ti/Al and steel/Al, respectively.…”

Section: Introductionmentioning

confidence: 96%

Interfacial Characteristics of Dissimilar Ti6Al4V/AA6060 Lap Joint by Pulsed Nd:YAG Laser Welding

Xue

Péreira

Vincze

et al. 2019

Metals

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This paper focuses on the interfacial characteristics of dissimilar Ti6Al4V/AA6060 lap joint produced by pulsed Nd:YAG laser beam welding. The process-sensitivity analysis of welding-induced interface joining quality was performed by using the orthogonal design method. Microstructural tests such as scanning electron microscopy and energy dispersive X-ray spectroscopy were used to observe the interfacial characteristics. The mechanism of interfacial crack initiation, which is an important indicator of joint property and performance, was assessed and analyzed. The preferred propagation paths of welding cracks along the interfaces of different intermetallic layers with high dislocation density were analyzed and discussed in-depth. The results indicate that discontinuous potential phases in the micro-crack tip would mitigate the mechanical resistance or performance of the welded joint, while the continuous intermetallic layer can lead to a sound jointing performance under pulsed Nd:YAG laser welding process.

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Cited by 16 publications

References 3 publications

Improving interfacial properties of a laser beam welded dissimilar joint of aluminium AA6056 and titanium Ti6Al4V for aeronautical applications

Improving interfacial properties of a laser beam welded dissimilar joint of aluminium AA6056 and titanium Ti6Al4V for aeronautical applications

Positional dependence of material flow in friction stir welding: Analysis of joint line remnant and its relevance to dissimilar metal welding

Interfacial Characteristics of Dissimilar Ti6Al4V/AA6060 Lap Joint by Pulsed Nd:YAG Laser Welding

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