Analysis of the SPF of a titanium alloy at lower temperatures

Chumachenko, E. N.; Портной, В. К.; Paris, Laurent; Thomas, Benedict

doi:10.1016/j.jmatprotec.2005.02.270

Cited by 23 publications

(16 citation statements)

References 2 publications

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“…The tests, which involved decreasing the strain rate step-by-step, were performed to determine the strain rate range of the superplasticity of all studied alloys, with a temperature range of α+β field. The testing temperature range was chosen in accordance with previous studies [39,40]. The uniaxial constant strain rate tensile tests and step-by-step increasing in the strain rate tests were conducted using a Walter-Bay LFM100 test machine (Walter + Bai AG, Löhningen, Switzerland).…”

Section: Materials and Test Experimentsmentioning

confidence: 99%

Experimental Investigation of the Effect of Temperature and Strain Rate on the Superplastic Deformation Behavior of Ti-Based Alloys in the (α+β) Temperature Field

Mosleh

Mikhaylovskaya

Котов

et al. 2018

Metals

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This paper presents the effect of temperature and strain rate on the superplastic deformation behavior of Ti-3%Mo-1%V-4%Al, Ti-4%V-6%Al, and Ti-1.8%Mn-2.5%Al alloys, which have different initial microstructures. The microstructure, before and after superplastic deformation in the deformation regimes that provided the maximum elongation, was analyzed. The deformation regimes, corresponding to the minimum strain hardening/softening effect, provided a higher elongation to failure due to their low tendency toward dynamic grain growth. As the values of stress became steady (σs), the elongation to failure and strain-hardening coefficient were analyzed under various temperature–strain rate deformation regimes. The analysis of variance of these values was performed to determine the most influential control parameter. The results showed that the strain rate was a more significant parameter than the temperature, with respect to the σs, for the investigated alloys. The most influential parameter, with both the elongation to failure and strain-hardening coefficient, was the temperature of the Ti-3%Mo-1%V-4%Al and Ti-1.8%Mn-2.5%Al alloys and the strain rate of the Ti-4%V-6%Al alloy.

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Section: Materials and Test Experimentsmentioning

confidence: 99%

Experimental Investigation of the Effect of Temperature and Strain Rate on the Superplastic Deformation Behavior of Ti-Based Alloys in the (α+β) Temperature Field

Mosleh

Mikhaylovskaya

Котов

et al. 2018

Metals

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“…The titanium alloys enable superplastic forming (SPF) from industrial sheets without any special preparation of the structure. Therefore, they are named "naturally" superplastic [139]. Even the TiAl alloys can possess good superplasticity when the microstructure is fine [140].…”

Section: Fabrication Of Integrally Stiffened Panel Parts By Superplasmentioning

confidence: 99%

Recent developments in plastic forming technology of titanium alloys

Yang

Fan

Sun

et al. 2011

Sci. China Technol. Sci.

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Titanium alloys have been used extensively in industry fields including aviation, aerospace and automobile due to their excellent comprehensive properties. Research and development of advanced plastic forming technology are of great importance to manufacturing titanium products of high performance and lightweight with low cost and short cycle. This paper analyzes the development tendencies of titanium alloy forming technology. Recent achievements in precision forming, microstructure control and multi-scale simulation of titanium alloys are reviewed. The forming techniques of large-sale integral complex components are presented. titanium alloys, precision forming, microstructure control, multi-scale simulation, large-scale integral complex components Citation:Yang H, Fan X G, Sun Z C, et al. Recent developments in plastic forming technology of titanium alloys.

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“…Ls-Dyna is a both implicit and explicit solver even if for this analysis only the explicit one, with 64 bits double precision, was used. The treatment of the deformation in an explicit finite element simulation is quasi-static; in fact, the equation of motion is fulfilled only at discrete time intervals, ∆t [16]. Moreover, the explicit time integration is conditionally stable and the stability limit for the time step approximately is:…”

Section: Ls-dynamentioning

confidence: 99%

“…The optimal temperature for the Ti-6Al-4 V superplastic forming ranges between 875°C and 925°C [1]; from this point of view, Chumachenko et al [16] correlated the alloy mechanical properties to the working temperatures. They showed that, for each temperature, there is an optimum strain rate that has to be imposed in order to improve the quality of the final product.…”

Section: Introductionmentioning

confidence: 99%

FE simulation and experimental considerations on TI alloy superplastic forming for aerospace applications

et al. 2009

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Titanium and its alloys have rapidly become a strategic material in aerospace industry due, for example, to high strength vs. weight ratio, excellent mechanical proprieties, corrosion resistance and galvanic compatibility with fiber reinforced composite materials. A big problem that has to be considered is, however, the higher cost of components as compared to other alloys. In fact, the market price of the base metal has to be added to manufacturing ones. To reduce production costs, Titanium net shape technologies have been continuously developed. Superplastic forming (SPF) technology can be considered in this frame. Through the SPF some alloys can be slowly formed well beyond their normal limitations at elevated temperatures, allowing very deep forming sequences. In this study, the SPF process to produce aircraft parts was investigated. The well-known Titanium alloy Ti6Al4V was chosen as workpiece material. The investigation was carried out by numerical analysis to check the predicting capability of these simulation tools. In detail, FE analyses were developed using two different codes, namely Marc and Ls-Dyna. The aim was the optimization of pressure trend to obtain the desired shape with a reasonable accuracy and without material breaking. Finally, some considerations on the experimental manufacturing of the components are reported.

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Analysis of the SPF of a titanium alloy at lower temperatures

Cited by 23 publications

References 2 publications

Experimental Investigation of the Effect of Temperature and Strain Rate on the Superplastic Deformation Behavior of Ti-Based Alloys in the (α+β) Temperature Field

Experimental Investigation of the Effect of Temperature and Strain Rate on the Superplastic Deformation Behavior of Ti-Based Alloys in the (α+β) Temperature Field

Recent developments in plastic forming technology of titanium alloys

FE simulation and experimental considerations on TI alloy superplastic forming for aerospace applications

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