Characterization of Hot Deformation Behavior of Ti-4.5Al-3V-2Mo-2Fe Titanium Alloy

Zhu, Li Wei; Wang, Xin Nan; Fei, Yue; Li, Jing; Zhi, Zhang

doi:10.4028/www.scientific.net/msf.849.309

Cited by 11 publications

(4 citation statements)

References 8 publications

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“…The region with a high value is not necessarily a safe processing region, and further analysis should be done with the instability parameter [45]. According to the definition of DMM model, the instability criterion of material during thermal deformation can be expressed as: When the value is less than 0, internal instability will occur inside the material.…”

Section: Resultsmentioning

confidence: 99%

Thermomechanical behaviour modelling and microstructure evolution of high Cr–Co–Mo aerospace bearing steel

Tang

Zhang

Yue

et al. 2023

Materials Science and Technology

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The microstructure evolution and hot-compressive behaviour of high Cr–Co–Mo bearing steel under different deformation conditions were investigated by dynamic recrystallisation (DRX) kinetics analysis and simulation. The results showed that the thermal deformation parameters and carbide dissolution have a great influence on the rheological properties and microstructure. The flow stress decreases with the increase of temperature and the decrease of strain rate. The grain boundary pinning effect is weakened by the dissolution of carbides into the matrix, resulting in the rapid growth of DRX grains. The processing map of high Cr–Co–Mo bearing steel was divided into five regions, and the most suitable processing parameters can be defined as the temperature range of 1000–1070°C and strain rate range of 0.01–0.003 s−1.

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Section: Resultsmentioning

confidence: 99%

Thermomechanical behaviour modelling and microstructure evolution of high Cr–Co–Mo aerospace bearing steel

Tang

Zhang

Yue

et al. 2023

Materials Science and Technology

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“…The hot deformation mechanism of titanium and titanium alloy is closely related to strain rate. The relation between stress and strain rate had been analyzed by the equation which have been reported widely in references [15][16][17] as follows:…”

Section: Methodsmentioning

confidence: 99%

“…Taking the natural logarithm for Eqn. (5) , and the following eqution can be obtained as: (10) Then the value of n2 can be obtained as: (11) The deformation activation energy Q (J/mol) of the alloy can be calculated [15]: calculated deformation activation energy (12) The relation of vs. Insin[h(ασ)] were given in Fig. 5, n2 had been estimated of 2.74552 and 2.57437 in two-phase and single-phase region respectively.…”

mentioning

confidence: 99%

Thermal Deformation Behavior of a New Metastable Beta Titanium Alloy

Wang

Zhi

2021

MSF

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The thermal deformation behavior of a new metastable beta titanium alloy composed of Ti-Al-Mo-V-Nb-Cr was studied under different experimental conditions of varying temperatures (760°C~ 970°C) and strain rates (0.001s−1, 0.01s−1, 0.1s−1, 1s−1 and 10s−1) up to deformation amount of 60%. The hot compression experiments were completed on a Gleeble-3500 thermal analogue. The experimental results showed that the true stress of the Ti-Al-Mo-V-Nb-Cr titanium alloy decreased with increasing the temperature and decreasing the strain rate, the stress peaks and the steady-state stress values were higher with the decreasing of temperature at the same strain rate. The calculated values of the deformation activation energy were 187.87 kJ/mol in the two-phase region and 165.17kJ/mol in beta single-phase region. The corresponding constitutive equation was determined by the multiple linear regression calculation on the hot compression experimental data, on the base of Arrhenius equations.

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“…But even if the h of an area is high, it does not necessarily mean it is safe for processing, as further analysis needs to be conducted on the instability parameter έ ( ) x [37]. From the definition of the DMM model, the instability criterion of materials in the process of thermal deformation can be expressed as follows:…”

Section: Hot Processing Mapmentioning

confidence: 99%

A study on hot deformation behavior of Ti-6Al-2V-0.5Zr-1.5Mo alloys

Ren

Zheng

2023

Mater. Res. Express

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Ti-6Al-2V-0.5Zr-1.5Mo alloys is a new type of titanium alloys developed on the basis of Ti-6Al-4V alloys. Compared with Ti-6Al-4V alloys, they are low in cost and excellent in performance. To offer an idea for hot working production, their thermal deformation behavior was studied through a Gleeble3500 machine, and the microstructure evolution during the thermal deformation was analyzed. After the experiment, the true stress-strain curves at strain rates of 0.001 s-1, 0.01 s-1, 0.1 s-1 and 1 s-1 at temperatures of 800, 850, 900, and 950 ℃ were worked out. The result showed that the flow stress decreased as the deformation temperature rose and the strain rate fell. The peak stress constitutive equation and flow stress prediction model were built through the Arrhenius equation. The correlation coefficient between the predicted data and the experimental data reached 0.9811, which meant that the flow stress could be predicated accurately through Arrhenius equation. In addition, the processing map was established based on the DMM theory, and the best process parameters of such an alloy were figured out.

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Characterization of Hot Deformation Behavior of Ti-4.5Al-3V-2Mo-2Fe Titanium Alloy

Cited by 11 publications

References 8 publications

Thermomechanical behaviour modelling and microstructure evolution of high Cr–Co–Mo aerospace bearing steel

Thermomechanical behaviour modelling and microstructure evolution of high Cr–Co–Mo aerospace bearing steel

Thermal Deformation Behavior of a New Metastable Beta Titanium Alloy

A study on hot deformation behavior of Ti-6Al-2V-0.5Zr-1.5Mo alloys

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