High temperature deformation behavior of near alpha Ti–5.6Al–4.8Sn–2.0Zr alloy

Li, Miaoquan; Pan, Hongsi; Lin, Yingying; Luo, Jiao

doi:10.1016/j.jmatprotec.2006.10.002

Cited by 82 publications

(36 citation statements)

References 14 publications

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“…The results indicated that the main softening mechanism should be dynamic recrystallization in α + β dual-phase region and dynamic recovery in β single-phase region, respectively [20,21]. It should be noted that the activation energy in β phase region was mostly reported in the range of 180-220 kJ/mol during hot deformation of some titanium alloys [10,[21][22][23], while the activation energy in β region of the Ti-55 alloy reached 279.88 kJ, which was higher than other titanium alloys. The possible reason is that the initial material used in this study was an as-rolled sheet, which possessed finer microstructure and intense deformation texture, so it was more difficult to deform plastically during hot compression.…”

Section: mentioning

confidence: 93%

Study on Hot Deformation Behavior and Microstructure Evolution of Ti55 High-Temperature Titanium Alloy

Wang

Jin

et al. 2017

Metals

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Abstract:The isothermal compression experiment of as-rolled Ti-55 alloy was carried out on a Gleeble-3800 thermal simulation test machine at the deformation temperature range of 700-1050 • C and strain rate range of 0.001-1 s −1 . The hot deformation behavior and the microstructure evolution were analyzed during thermal compression. The results show that the apparent activation energy Q in α + β dual-phase region and β single-phase region were calculated to be 453.00 KJ/mol and 279.88 KJ/mol, respectively. The deformation softening mechanism was mainly controlled by dynamic recrystallization of α phase and dynamic recovery of β phase. Discontinuous yielding behavior mainly occurred in β phase region, which weakened gradually with the increase of deformation temperature (>990 • C) and strain rate (0.01-1 s −1 ) in β phase region. The processing map derived from Murty's criterion was more accurate in predicting the hot workability than that derived from Prasad's criterion. The optimized hot working window was 850-975 • C/0.001-1 s −1 , in which sufficient dynamic recrystallization occurred and α + β-transus microstructure was obtained. When deformed at higher temperature (≥1000 • C), coarsened lath-shape β-transus microstructure was formed, while deformed at lower temperature (≤825 • C) and higher strain rate (≥0.1 s −1 ), the dynamic recrystallization was not sufficient, thus flow instability appeared because of shear cracking.

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Section: mentioning

confidence: 93%

Study on Hot Deformation Behavior and Microstructure Evolution of Ti55 High-Temperature Titanium Alloy

Wang

Jin

et al. 2017

Metals

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“…The Ti-5.6Al-4.8Sn-2.0Zr alloy is also a kind of titanium alloy considered for high temperature applications, as a potential titanium alloy to manufacture aerofoil blades and discs in the aviation and aerospace industries [3]. It is well known that the final microstructure determines the mechanical properties of titanium alloys, and is very sensitive to the process parameters in high temperature deformation.…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution in the high temperature compression of Ti-5.6Al-4.8Sn-2.0Zr alloy

Luo

Pan

2010

Rare Metals

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Isothermal compression of a Ti-5.6Al-4.8Sn-2.0Zr alloy was conducted on a Thermecmaster-Z simulator at the deformation temperatures ranging from 960 to 1060°C, the strain rates ranging from 0.001 to 10.0 s −1 , and the maximum height reduction of 70.0%. In the two-phase region of the Ti-5.6Al-4.8Sn-2.0Zr alloy, the volume fraction of α phase decreases with an increase in deformation temperature, but the grain size has a slight variation with deformation temperature. The strain rate affects both morphologies and grain size of the α phase in the isothermal compression of the Ti-5.6Al-4.8Sn-2.0Zr alloy. The optimal height reduction also contributes to the small and well-distributed α phase in the isothermal compression of Ti-5.6Al-4.8Sn-2.0Zr alloy.

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“…The temperature corresponding to the top of the endothermic peak is 828.64°C, and it is determined as the phase transition temperature of the Ti-5.6Al-4.8Sn-2.0Zr alloy after hydrogenation. The phase transition temperature of the Ti-5.6Al-4.8Sn-2.0Zr alloy is from 1035°C to 1040°C through microscope examination [13]. Comparing the DSC curves of the hydrogenated with the as-received Ti-5.6Al-4.8Sn-2.0Zr alloys, the phase transition temperature is decreased by 150-200°C.…”

Section: Resultsmentioning

confidence: 98%

“…The Ti-5.6Al-4.8Sn-2.0Zr alloy was another titanium alloy considered for high temperature applications, such as for the manufacture of aerofoil blades and discs in the aviation and aerospace industries [13]. Li et al [13] investigated the flow behavior and understood the deformation mechanisms in the α+β two-phase and β single-phase regions through isothermal compression of the Ti-5.6Al-4.8Sn-2.0Zr alloy at different deformation temperatures, strain rates and strains.…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrogenation on the microstructure of Ti-5.6Al-4.8Sn-2.0Zr alloy

Lin

2009

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The hydride phase in the Ti-5.6Al-4.8Sn-2.0Zr alloy after hydrogenation was investigated through TEM and XRD analysis. The experimental results show that the phase transition temperature of the hydrogenated Ti-5.6Al-4.8Sn-2.0Zr alloy is decreased approximately by 150-200ºC. XRD analysis verifies that the hydrogenation treatment accelerates the phase transition process from α phase to β phase of the Ti-5.6Al-4.8Sn-2.0Zr alloy, so as to decrease the phase transition temperature of the alloy. Meanwhile, TiH 2 hydride (δ phase) with strip structure appears in α phase and β phase.

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High temperature deformation behavior of near alpha Ti–5.6Al–4.8Sn–2.0Zr alloy

Cited by 82 publications

References 14 publications

Study on Hot Deformation Behavior and Microstructure Evolution of Ti55 High-Temperature Titanium Alloy

Study on Hot Deformation Behavior and Microstructure Evolution of Ti55 High-Temperature Titanium Alloy

Microstructure evolution in the high temperature compression of Ti-5.6Al-4.8Sn-2.0Zr alloy

Effect of hydrogenation on the microstructure of Ti-5.6Al-4.8Sn-2.0Zr alloy

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