Fiber laser welding of dissimilar titanium (Ti-6Al-4V/cp-Ti) T-joints and their laser forming process for aircraft application

Froend, Martin; Fomin, Fedor; Riekehr, Stefan; Álvarez, Pedro; Zubiri, F.; Bauer, S.; Klusemann, Benjamin; Kashaev, Nikolai

doi:10.1016/j.optlastec.2017.05.017

Cited by 35 publications

(16 citation statements)

References 7 publications

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“…The material of the stringer was Ti-6Al-4V alloy (ASTM Grade 5, AMS 4911F [14]). All the materials were delivered in the form of 500 × 500 mm 2 sheets with a thickness of 0.8 mm. Prior to welding, the sheets were cut into the coupons of required geometry.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…Prior to welding, the faying edges of the specimens were machined, ground, and thoroughly cleaned with ethanol to remove any surface oxides and contaminants. A detailed description of the welding process, the equipment used, shielding conditions, and optimization of the process parameters has already been reported in our previous study [2]. The parameters finally chosen and employed for the welding of coupons are listed in Table 4.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…In the present study, the LBW of dissimilar joints between commercially pure titanium (CP-Ti, ASTM Grade 2) and Ti-6Al-4V alloy (ASTM Grade 5) in a T-joint configuration was investigated. A new and creative approach to combine the high formability of the CP-Ti skin with the high strength of Ti-6Al-4V stringer allows the production of a structure exhibiting excellent mechanical properties and complying with the stringent regulations of the aircraft industry [2]. Owing to this tailor-engineered approach, different parts of the same weldment possess their own mechanical and physical properties required at specific locations.…”

Section: Introductionmentioning

confidence: 99%

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Metallurgical aspects of joining commercially pure titanium to Ti-6Al-4V alloy in a T-joint configuration by laser beam welding

Fomin

Froend

Ventzke

et al. 2018

Int J Adv Manuf Technol

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The present paper focuses on the metallurgical and microstructural characterization of the laser beam-welded T-joints between commercially pure titanium (CP-Ti) and Ti-6Al-4V alloy. The weld regions were comprehensively studied and the mechanisms leading to the final morphology within each weld region were described. The link between microstructural features and local mechanical properties was demonstrated. Owing to different constitution, the responses of the two titanium alloys to thermal cycles imposed by laser welding are completely different. A strong interface with no dilution zone between the two alloys was observed. The cooling rate during the welding process is high enough for diffusionless martensitic transformation in the Ti-6Al-4V part of the fusion zone. In contrast, no evidence of martensite was found in the CP-Ti because of low solute content and, consequently, much higher critical cooling rate. Plausible reason for some controversy found in the literature on the resulting transformation products after laser processing of CP-Ti was given. The present findings might have important industrial implications because careful microstructural characterization revealed the real position of the skin fusion line, which is of great importance for fulfillment of the weld quality criteria.

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Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Metallurgical aspects of joining commercially pure titanium to Ti-6Al-4V alloy in a T-joint configuration by laser beam welding

Fomin

Froend

Ventzke

et al. 2018

Int J Adv Manuf Technol

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“…This alloy has a high fracture toughness, specific strength and room-temperature ductility owing to the ordered orthorhombic phase [1]. Froend et al reported the use of dissimilar cpTi/Ti-6-4 weld joint in aircraft industry [35]. They pointed out that most of the aerospace titanium alloys have high strength and a low formability due to which it is challenging to use them in the outer skin material of the aircraft.…”

Section: Application Of Dissimilar Titanium Alloys Weldments (Dtws)mentioning

confidence: 99%

Influence of welding process on the properties of dissimilar titanium alloy weldments: a review

Junaid

Cheema

2020

JMST Adv.

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The extensive use of titanium alloys in a variety of complex industrial applications may be attributed to their properties of high strength-to-weight ratio, corrosion resistance and high temperature strength. Recently, the use of dissimilar titanium alloys has become popular to achieve contrasting characteristics in a single unit. In the fabrication of the structures, joining methods such as welding hold the key in the attainment of the desired characteristics. The present study is aimed at reviewing various state-of-the-art processes used for welding of dissimilar titanium alloys. In particular, the influence of different welding methods such as gas tungsten arc welding (GTAW), laser and electron beam welding on the microstructure, mechanical properties and other characteristics of dissimilar weldments of α, α + β and β titanium alloys has been emphasized. The underlying phenomena that govern the effect of weld processing parameters on the mechanical strength, microstructure and weld joint quality of the alloys were exploited. Moreover, detailed investigations on the fusion zone porosities and evolution of intermetallic concept at the interfacial regions have been examined. Furthermore, different remedial approaches to enhance the joint quality such as beam offsetting, process hybridization, aging and post-weld heat treatments are investigated thoroughly. The latest trends in dissimilar welding of titanium alloys to upheave further research in this area have been reported in the context of their application in industrial applications.

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“…High-power laser-matter interactions have received increased attention in various conditions, including laser welding [1,2], laser drilling [3], laser cutting [4] and laser processing [5], as well as in the study of laser induced damages. When exposed to a high-power continuous wave (CW) laser, one of the most practical interests for structures used in the aerospace industry is the time that the melt front reaches the opposite surface.…”

Section: Introductionmentioning

confidence: 99%

High-power laser resistance of filled sandwich panel with truss core: An experimental study

Yuan

Wang

Song

et al. 2018

Composite Structures

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Fiber laser welding of dissimilar titanium (Ti-6Al-4V/cp-Ti) T-joints and their laser forming process for aircraft application

Cited by 35 publications

References 7 publications

Metallurgical aspects of joining commercially pure titanium to Ti-6Al-4V alloy in a T-joint configuration by laser beam welding

Metallurgical aspects of joining commercially pure titanium to Ti-6Al-4V alloy in a T-joint configuration by laser beam welding

Influence of welding process on the properties of dissimilar titanium alloy weldments: a review

High-power laser resistance of filled sandwich panel with truss core: An experimental study

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