Thermo-mechanical sheet metal forming of aero engine components in Ti-6Al-4V – PART 1: Material characterisation

Odenberger, Eva-Lis; Hertzman, J.; Thilderkvist, Per; Merklein, Marion; Kuppert, Andreas; Stöhr, Thomas; Lechler, J.; Oldenburg, Mats

doi:10.1007/s12289-012-1093-8

Cited by 34 publications

(20 citation statements)

References 30 publications

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“…As for other hcp alloys, the flow stress is strongly dependent on both temperature and strain rate (Khan et al, 2004(Khan et al, , 2007Lee and Lin, 1998;Majorell et al, 2002;Peirs et al, 2010;Tuninetti et al, 2012b;Tuninetti and Habraken, 2014;Porntadawit et al, 2014). In addition, TA6V exhibits a strength asymmetry between tension and compression also called strength differential (SD) effect (Gilles et al, 2011;Hammami et al, 2011;Odenberger et al, 2012;Tuninetti et al, 2012b). Gilles et al (2011) and Nixon et al (2010) explain that this effect is the result of the combination of a sharp initial basal texture and of the polarity of the deformation twinning mechanism, even for monotonic loadings.…”

Section: Introductionmentioning

confidence: 99%

Anisotropy and tension–compression asymmetry modeling of the room temperature plastic response of Ti–6Al–4V

Tuninetti

Gilles

Milis

et al. 2015

International Journal of Plasticity

102

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Section: Introductionmentioning

confidence: 99%

Anisotropy and tension–compression asymmetry modeling of the room temperature plastic response of Ti–6Al–4V

Tuninetti

Gilles

Milis

et al. 2015

International Journal of Plasticity

102

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“…According to hot sheet metal forming of Ti-6242, increasing forming temperatures alone would not necessarily imply better forming characteristics and optimal forming conditions would be a combination of forming velocity, temperature and holding time, as verified by Eva-Lis Odenberger et al [2]. They also investigated the possibility to design suitable thermo-mechanical forming processes for titanium sheet metal component with acceptable accuracy, using finite element (FE) analyses of hot sheet metal forming in the titanium alloy Ti-6Al-4V [5,6]. Nitin Kotkunde et al performed deep drawing experiments of Ti-6Al-4V alloy sheet at elevated temperature and found that maximum LDR of 1.8 was achieved at 400 • C but it was still lesser than other structural alloy [7].…”

Section: Introductionmentioning

confidence: 99%

The effect of pressurization path on high pressure gas forming of Ti-3Al-2.5V at elevated temperature

Liu

Wang

Dang

et al. 2015

MATEC Web of Conferences

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Abstract. High pressure gas forming is a tubular component forming technology with pressurized gas at elevated temperature, based on QPF, HMGF and Hydroforming. This process can be used to form tube blank at lower temperatures with high energy efficiency and also at higher strain rates. With Ti-3Al-2.5V Ti-alloy tube, the potential of HPGF was studied further through experiments at the elevated temperatures of 650 • C and 700 • C. In order to know the formability of the Ti-alloy tube, tensile tests were also carried out. The results show that: at the temperatures of 650 • C and 700 • C, the flow curves exhibit the power-law constitutive relation until peak stress is reached and the deformability is suitable for the HPGF process of Ti-3Al-2.5V alloy tube. The effects of pressurization path on the corner filling process and thickness profile are obvious. The high pressure inflow process can result in temperature difference between the straight wall area and corner area, which makes the thickness profile special. Besides, with the stepped pressurization path, the more constant filling rate and better thickness profile can be obtained.

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“…Though a number of publications exist related to hot stamping of titanium alloys [9,[21][22][23], deformation mechanisms of titanium alloys under hot stamping conditions are still not fully investigated. More knowledge and understanding of this technology and material behaviour is urgently needed to popularise and enable it to be adopted in the future.…”

Section: Introductionmentioning

confidence: 99%

Formability and microstructure evolution mechanisms of Ti6Al4V alloy during a novel hot stamping process

Kopeć

Wang

Politis

et al. 2018

Materials Science and Engineering: A

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A novel hot stamping process for Ti6Al4V alloy using cold forming tools and a hot blank was presented in this paper. The formability of the material was studied through uniaxial tensile tests at temperatures ranging from 600 to 900 °C and strain rates ranging from 0.1 to 5 s-1. An elongation ranging from 30% to 60% could be achieved at temperatures ranging from 750 to 900°C respectively. The main microstructure evolution mechanisms varied with the deformation temperature, including recovery, phase transformation and recrystallization. The hardness of the material after deformation first decreased with the temperature due to recovery, and subsequently increased mainly due to the phase transformation. During the hot stamping tests, qualified parts could be formed successfully at heating temperatures ranging from 750 to 850°C. The forming failed at lower temperatures due to the limited ductility of the material. At temperatures higher than 900°C, extensive phase transformation of α to β occurred during the heating. During the transfer and forming, the temperature dropped significantly which led to the formation of transformed β, reduction of the formability and subsequent failure. The post-form hardness distribution demonstrated the same tendency as that after uniaxial tensile tests.

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Thermo-mechanical sheet metal forming of aero engine components in Ti-6Al-4V – PART 1: Material characterisation

Cited by 34 publications

References 30 publications

Anisotropy and tension–compression asymmetry modeling of the room temperature plastic response of Ti–6Al–4V

Anisotropy and tension–compression asymmetry modeling of the room temperature plastic response of Ti–6Al–4V

The effect of pressurization path on high pressure gas forming of Ti-3Al-2.5V at elevated temperature

Formability and microstructure evolution mechanisms of Ti6Al4V alloy during a novel hot stamping process

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