Correlation between Flow Behavior and Microstructure Evolution during α/β Deformation of TA19 Titanium Alloy

Wang, Ke; Sun, Dongliang; Wu, Yanlin; Xin, Renlong; Wu, Mingyu; Liu, Qing

doi:10.1002/adem.201600198

Cited by 6 publications

(2 citation statements)

References 30 publications

(36 reference statements)

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“…This occurs because lower strain rates extend deformation cycles, enabling DRX and DRV to significantly reduce dislocation density and enhanced dynamic softening effects. Conversely, higher strain rates result in greater dislocation densities, leading to enhanced work hardening effect [ 25 ]. Additionally, at lower temperatures, the resistance to dislocation motion increases, resulting in more pronounced work hardening [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

Hot Deformation Behavior and Microstructure Evolution Mechanisms of Ti6Al4V Alloy under Hot Stamping Conditions

Qu,

Gu,

et al. 2024

Materials

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Through the study of the thermal rheological behavior of Ti6Al4V alloy at different temperatures (500 °C, 600 °C, 700 °C, and 800 °C) and different strain rates (0.1 s−1, 0.05 s−1, 0.01 s−1, and 0.005 s−1), a constitutive model was developed for Ti6Al4V alloy across a wide temperature range in the hot stamping process. The model’s correlation coefficient reached 0.9847, indicating its high predictive accuracy. Hot processing maps suitable for the hot stamping process of Ti6Al4V alloy were developed, demonstrating the significant impact of the strain rate on the hot formability of Ti6Al4V alloy. At higher strain rates (>0.05 s−1), the hot processing of Ti6Al4V alloy is less prone to instability. Combining hot processing maps with hot stamping experiments, it was found that the forming quality and thickness uniformity of parts improved significantly with the increase in stamping speed. The phase composition and microstructures of the forming parts under different heating temperature conditions have been investigated using SEM, EBSD, XRD, and TEM, and the maximum heating temperature of hot stamping forming was determined to be 875 °C. The recrystallization mechanism in hot stamping of Ti6Al4V alloys was proposed based on EBSD tests on different sections of a hot stamping formed box-shaped component. With increasing deformation, the effect of dynamic recrystallization (DRX) was enhanced. When the thinning rate reached 15%, DRX surpassed dynamic recovery (DRV) as the dominant softening mechanism. DRX grains at different thinning rates were formed through both discontinuous dynamic recrystallization (DDRX) and continuous dynamic recrystallization (CDRX), with CDRX always being the dominant mechanism.

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Section: Resultsmentioning

confidence: 99%

Hot Deformation Behavior and Microstructure Evolution Mechanisms of Ti6Al4V Alloy under Hot Stamping Conditions

Qu,

Gu,

et al. 2024

Materials

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“…Ti–5Al–2Sn–2Zr‐4Mo–4Cr is a “β‐rich” two‐phase titanium alloy that has been extensively used to manufacture fan blades and compressor disks of aircraft engines due to high strength, excellent corrosion resistance, superior fracture toughness, and deep hardenability . The thermomechanical processing route of an engineering alloy determines the microstructure and must be controlled for optimum mechanical properties . The superplastic diffusion bonding and press bonding are both thermomechanical processing under a low strain rate.…”

Section: Introductionmentioning

confidence: 99%

Fragmentation of α Grains Accelerated by the Growth of β Phase in Ti–5Al–2Sn–2Zr–4Mo–4Cr during Hot Deformation

Sun

2017

Adv Eng Mater

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The fragmentation of elongated α grains accelerated by the growth of β phase in Ti-5Al-2Sn-2Zr-4Mo-4Cr during hot deformation was examined using electron backscattered diffraction (EBSD) and transmission electron microscopy (TEM). It was determined that boundary splitting resulted in the fragmentation of αE. The kinked sharp α grains, which were formed with help of "civilian" growth of β phase, are necessary structures for the fragmentation of elongated α grains. In addition, the texture results showed an initial deviation from Burgers orientation relationship (OR) in α/β interphase boundaries, indicating that the "civilian" growth of the β phase based on the pre-existing β grain boundaries implied a constant loss of coherency in α/β interphase boundaries, which also accelerated the fragmentation of elongated α grains.

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The Microstructural Evolution and Special Flow Behavior of Ti-5Al-2Sn-2Zr-4Mo-4Cr During Isothermal Compression at a Low Strain Rate

Sun

2017

J. of Materi Eng and Perform

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Correlation between Flow Behavior and Microstructure Evolution during α/β Deformation of TA19 Titanium Alloy

Cited by 6 publications

References 30 publications

Hot Deformation Behavior and Microstructure Evolution Mechanisms of Ti6Al4V Alloy under Hot Stamping Conditions

Hot Deformation Behavior and Microstructure Evolution Mechanisms of Ti6Al4V Alloy under Hot Stamping Conditions

Fragmentation of α Grains Accelerated by the Growth of β Phase in Ti–5Al–2Sn–2Zr–4Mo–4Cr during Hot Deformation

The Microstructural Evolution and Special Flow Behavior of Ti-5Al-2Sn-2Zr-4Mo-4Cr During Isothermal Compression at a Low Strain Rate

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