Friction stir welding of AA2198-T3 butt joints for aeronautical applications

Bitondo, C.; Prisco, Umberto; Squillace, Antonino; Giorleo, G.; Buonadonna, Pasquale; Dionoro, Gennaro; Campanile, G.

doi:10.1007/s12289-010-0958-y

Cited by 35 publications

(18 citation statements)

References 5 publications

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“…The joint A gave rise to a slightly better tensile resistance, as assessed both with tensile [19] and FIMEC tests. This could be ascribed to the finer structure of the nugget in sample A compared to the joint B (Fig.…”

Section: Fsw Welded Jointsmentioning

confidence: 96%

A Weldability Study of Al–Cu–Li 2198 Alloy

et al. 2014

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Al-Cu-Li alloys, conceived for automotive and aeronautic applications thanks to the high mechanical resistance/density ratio, exhibit weldability issues common to all light alloys. In this paper, the weldability of Al-Cu-Li 2198 alloy was studied by comparing features of welds carried out by two processes, the traditional arc welding and the friction stir welding (FSW). Welded joints were submitted to optical and SEM metallographic examinations with EDS microanalysis measurements. Mechanical characteristics were evaluated through microhardness tests and the instrumented indentation test FIMEC (Flat-top cylinder Indenter for MEchanical Characterization).

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Section: Fsw Welded Jointsmentioning

confidence: 96%

A Weldability Study of Al–Cu–Li 2198 Alloy

et al. 2014

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“…Difficulties are encountered not only when forming sheet metal but also when joining. Neverthe-less, the decrease in construction weight would not be possible if not for the development in welding technologies such as electron and laser beam welding [22][23][24][25][26][27] of friction stir welding [28,29]. This paper is focused on analyzing the forming process of thin titanium panels with stiffeners.…”

Section: Introductionmentioning

confidence: 99%

Analysis of forming thin titanium panels with stiffeners

Adamus

Winowiecka

Dyner

2017

Archives of Metallurgy and Materials

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The growing demand for light and durable products has caused an increase in interest in products formed of thin sheets. In order to ensure sufficient stiffness of the drawn -parts, stiffening is often performed. Unfortunately, during the forming of stiffeners unwanted deformations of the drawn parts very often appear, which prevent them from further exploitation. In the paper, forming thin titanium panels with stiffeners is analysed. The panels are made of sheets of commercially pure titanium: Grades 2, 3 and 4. In the results of numerical analyses which were performed using PamStamp 2G, taking into consideration the impact of the blank holder force and friction conditions on the strain distribution in the drawn parts, sheet thinning and springback values are presented. The numerical analysis results were compared with the experimental tests. It was concluded that in order to prevent panel deformation being a result of residual stresses, it is necessary to ensure adequate friction conditions on the contact surfaces between the deformed material and tools as well as a suitable blank holder force.

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“…In order to improve the drawability of titanium sheets, superplastic forming is applied [13]. New welding technologies, such as electron and laser beam welding [14][15][16][17] or friction stir welding [18][19][20] allow for the development of new aviation designs as well as modification in existing ones and therefore also contribute to weight reduction. Current design criteria are very complicated, hence all the improvements would not be possible if not for new computation methods, advances in modelling and simulation both for material and process design.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of forming titanium drawn part

Adamus

Lacki

2015

Meccanica

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Structure weight is a priority issue in the transport industry, especially in aviation, therefore the demand for drawn parts made of titanium has grown steadily. Titanium in comparison to steel and aluminium has a much more beneficial specific strength so it is used where high mechanical strength and low construction weight are especially essential. In view of its high melting temperature, titanium is also used for aircraft fire walls. Although titanium has excellent properties such as high strength, low weight and good corrosion resistance, it is very difficult in production and processing. There are many technological problems that have to be overcome in forming titanium sheets. Titanium, especially titanium alloy sheets have poor drawability, high springback and low tribological properties. In the paper, the numerical analysis of forming a titanium panel made of commercially pure Gr 2 titanium is presented. The numerical simulation has been performed using the PamStamp program, dedicated to sheet-metal forming, based on the finite element method. In addition to the stress and strain distribution being analysed, the influence of the holding-down force and frictional conditions on the forming process are examined. The quality of the obtained titanium drawn-part is assessed basing on the correctness of its shape and dimensions with the reference ones, as well as on material thinning.

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Friction stir welding of AA2198-T3 butt joints for aeronautical applications

Cited by 35 publications

References 5 publications

A Weldability Study of Al–Cu–Li 2198 Alloy

A Weldability Study of Al–Cu–Li 2198 Alloy

Analysis of forming thin titanium panels with stiffeners

Numerical simulation of forming titanium drawn part

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