Characterization of hot deformation behavior of as-cast TC21 titanium alloy using processing map

Zhu, Yanjun; Zeng, Weidong; Feng, Fan; Sun, Yu; Han, Yuanfei; Zhou, Yigang

doi:10.1016/j.msea.2010.11.015

Cited by 118 publications

(34 citation statements)

References 23 publications

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“…The relationship of temperature, strain rate and strain during high temperature deformation is generally expressed by the Arrhenius-type equations as following 17,[21][22] :…”

Section: Kinetics Analysis Based On Arrhenius-type Equationmentioning

confidence: 99%

Identification for the Optimal Working Parameters of Ti-6Al-4V-0.1Ru Alloy in a Wide Deformation Condition Range by Processing Maps Based on DMM

et al. 2016

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The hot deformation behaviours of Ti-6Al-4V-0.1Ru alloy were investigated by isothermal hot compression tests in the temperature range of 1023-1423 K and strain rate range of 0.01-10 s -1 . The β transus was determined to be 1198 K by continuous heating method. The values of deformation activation energy Q at the strain of 0.3 were calculated to be 630.01 kJ/mol in dual-phase field and 331.75 kJ/mol in β-phase field. Moreover, the processing maps at the strain of 0.2, 0.4, 0.6 and 0.8 were developed based on dynamic materials model (DMM). To deeply understand the microstructure evolution mechanism during hot deformation processes and to verify the processing maps, the microstructures at different deformation conditions were observed. The stable microstructures (i.e. globularization, dynamic recovery (DRV) and β dynamic recrystallization (β-DRX)) and instable microstructures (i.e. lamellae kinking and flow localization) were obtained. To make it useful in the design of industrial hot working schedules for this material, a microstructural mechanism map was constructed on the basis of processing maps and microstructure observation.

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“…The relationship of temperature, strain rate and strain during high temperature deformation is generally expressed by the Arrhenius-type equations as following 17,[21][22] :…”

Section: Kinetics Analysis Based On Arrhenius-type Equationmentioning

confidence: 99%

Identification for the Optimal Working Parameters of Ti-6Al-4V-0.1Ru Alloy in a Wide Deformation Condition Range by Processing Maps Based on DMM

et al. 2016

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“…b alloy, referred to as TC21, with the composition Ti-5.97Al-2.06Sn-2.02Zr-2.96Mo-1.25Cr-2.08Nb-xSi (wt.%), has been shown to exhibit high damage tolerance when a lamellar microstructure is present, and provides weight reduction, long service life, and high reliability in aircraft applications [4]. Recently, a variety of studies on the phase transformation [5][6][7], thermomechanical processes [8,9] and thermohydrogen treatment [10] of this alloy have been performed. However, the effect of the lamellar microstructure on mechanical properties of this alloy has not been thoroughly investigated.…”

mentioning

confidence: 99%

Influence of Cooling Rate and Aging on the Lamellar Microstructure and Fractography of TC21 Titanium Alloy

Shao

Zhao

et al. 2013

Metallogr. Microstruct. Anal.

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A new titanium alloy (Ti-5.97Al-2.06Sn-2.02Zr-2.96Mo-1.25Cr-2.08Nb-xSi, wt.%) was cooled at different rates to produce a variety of microstructures. Phase and microstructure characterization were performed using LM, SEM, TEM, and XRD. The b phase transformed to the a 00 phase upon water quenching. The transformation (b ? b metastable ? a) took place when the cooling rate decreased to the air cooling and furnace cooling rates. After a subsequent aging treatment, both the a 00 and the metastable b phase decomposed into a and b phases with different morphologies. The tensile and yield strength values depended on the final microstructures and were related to the fractal dimension of the fracture surfaces.

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“…The power dissipation map represents the manner in which the power is dissipated by the material through microstructure evolution [17]. Figure 6 shows the power dissipation map of the Ti-4Al-1Sn-2Zr-5Mo-8V-2.5Cr alloy for a strain of 0.7, which is constructed at strain rates ranging from 0.001 to 1 s −1 and deformation temperature from 780 • C to 930 • C. It is clear that the variation of values of η is very sensitive to the deformation parameters (strain rate and deformation temperature).…”

Section: Processing Mapmentioning

confidence: 99%

“…In particular, optimal hot workability temperature range and strain rate range can be readily read off on its specific processing map. For instance, the optimal hot processing conditions for a cast TC21 titanium alloy was found to be at temperatures of 1000 to 1150 • C and with strain rates of 0.01 to 0.5 s −1 through the establishment of the processing map [17]. Li et al [18] also identified a suitable temperature range (from 770 to 850 • C) and strain rate range (from 0.01 to 0.1 s −1 ) through construction of the processing map for TC17 alloy.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Deformation Mechanism of a near β Titanium Alloy through Isothermal Compression

Lü

Zhang

et al. 2017

Metals

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This study investigated the hot deformation behavior of Ti-4Al-1Sn-2Zr-5Mo-8V-2.5Cr alloy through isothermal compression tests at temperatures from 780 to 930 • C with strain rates ranging from 0.001 to 1 s −1 . The flow stress decreases with a decreased strain rate and an increased temperature. A constitutive equation was established for this alloy and the dependence of activation energy on temperature and strain rate is discussed. We further proposed a processing map using the dynamic materials model. On the processing map various domains of flow stability and flow instability can be identified. The deformation mechanisms associated with flow stability regions are mainly dynamic recrystallization (DRX) and dynamic recovery (DRV). The flow instability is manifested in the form of the band of flow localizations. The optimum processing conditions are suggested such that the temperature range is from 780 to 880 • C and the strain rate ranges from 0.001 to 0.01 s −1 .

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Characterization of hot deformation behavior of as-cast TC21 titanium alloy using processing map

Cited by 118 publications

References 23 publications

Identification for the Optimal Working Parameters of Ti-6Al-4V-0.1Ru Alloy in a Wide Deformation Condition Range by Processing Maps Based on DMM

Identification for the Optimal Working Parameters of Ti-6Al-4V-0.1Ru Alloy in a Wide Deformation Condition Range by Processing Maps Based on DMM

Influence of Cooling Rate and Aging on the Lamellar Microstructure and Fractography of TC21 Titanium Alloy

Investigation of the Deformation Mechanism of a near β Titanium Alloy through Isothermal Compression

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