Predicting Workability of a Low-Cost Powder Metallurgical Ti–5Al–2Fe–3Mo Alloy Using Constitutive Modeling and Processing Map

Pan, Di; Liu, Bin; Xu, Rongjun; Qiu, Jingwen; Liu, Chunxuan

doi:10.3390/ma14040836

Cited by 9 publications

(6 citation statements)

References 57 publications

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“…However, titanium alloys are much more expensive compared with steels and other metallic materials, which limits their applications. The development, production, and characterization of low-cost titanium alloys are current research hotspots [ 13 , 14 , 15 , 16 , 17 ]. For these reasons, cheap alloying elements, such as Al, Fe, and Cr, instead of expensive ones, such as V, Mo, and Nb, are used to design titanium alloys and achieve a cut in cost [ 18 , 19 , 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD

Ding

Zhang

et al. 2021

Materials

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The high cost of development and raw materials have been obstacles to the widespread use of titanium alloys. In the present study, the high-throughput experimental method of diffusion couple combined with CALPHAD calculation was used to design and prepare the low-cost and high-strength Ti-Al-Cr system titanium alloy. The results showed that ultra-fine α phase was obtained in Ti-6Al-10.9Cr alloy designed through the pseudo-spinodal mechanism, and it has a high yield strength of 1437 ± 7 MPa. Furthermore, application of the 3D strength model of Ti-6Al-xCr alloy showed that the strength of the alloy depended on the volume fraction and thickness of the α phase. The large number of α/β interfaces produced by ultra-fine α phase greatly improved the strength of the alloy but limited its ductility. Thus, we have demonstrated that the pseudo-spinodal mechanism combined with high-throughput diffusion couple technology and CALPHAD was an efficient method to design low-cost and high-strength titanium alloys.

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Section: Introductionmentioning

confidence: 99%

Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD

Ding

Zhang

et al. 2021

Materials

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“…The degree of polynomial plays a decisive role in the fitting accuracy. Literature [25] shows that the fitting of the sixth-degree polynomial can fully meet the accuracy requirements and is suitable for expressing the relationship between four material constants and strain.…”

Section: Establishment and Verification Of Constitutive Equationmentioning

confidence: 99%

“…Similarly, the relationship with the work hardening coefficient m and power dissipation rate η is shown in the Eq. ( 17) [24][25][26]:…”

Section: Processing Mapsmentioning

confidence: 99%

Analysis of thermal deformation behavior and workability of 37CrS4 special steel

Yang¹,

Wang²,

Xue³

2023

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In order to optimize the thermal forging process of 37CrS4 special steel, single-pass thermal pressing tests are conducted, and a strain compensation Arrhenius constitutive equation is proposed based on the stress-strain curves of 37CrS4 at the temperature of 900-1100 • C and the strain rate of 0.1-10 s −1 . The stress values calculated from the equation are in good agreement with the counterparts in the thermal simulation compression test. The high correlation between the calculated and experimental data verifies the correctness of the strain compensation based on Arrhenius constitutive equation. According to the dynamic material model and instability criterion, the processing maps of 37CrS4 are established. It is concluded that 37CrS4 is more suitable for thermal working at a strain rate of 0.1-0.37 s −1 and temperature of 1000-1100 • C.

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“…The material parameters in the default model are all constant, and the effect of strain on the constitutive model is not considered in the process of modeling. Various evidences show that each material constant in the constitutive equation is not a fixed value, but a mapping relationship with strain [25,26]. Therefore, it is necessary to modify the traditional Arrhenius constitutive equation.…”

Section: ε-Lnσ P Relation Curve and Lnmentioning

confidence: 99%

Strain Modified Constitutive Equation and Processing Maps of High Quality 20MnCr5(SH) Gear Steel

Yang

Wang

Zheng³

et al. 2021

Crystals

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In order to develop the high-temperature forging process of high-quality 20MnCr5(SH) gear steel, according to the physical characteristics of high-temperature hot deformation of 20MnCr5(SH), the single pass hot pressing test was carried out in the temperature range of 930–123 °C and the strain rate range of 0.002–2s−1 by using a Gleeble-1500D thermal simulator. The stress-strain curve of 20MnCr5(SH) was analyzed and confirmed by microstructure analysis. The dynamic recrystallization occurred, and the constitutive equation of 20MnCr5(SH) high temperature flow stress was established. Considering that the traditional Arrhenius constitutive equation does not consider the effect of strain on the constitutive equation, a strain modified Arrhenius constitutive equation is proposed. The results show that the correlation is 0.9895 and the average relative error is 8.048%, which verifies the stress prediction ability of the strain modified constitutive equation. According to the dynamic material theory and instability criterion, the processing maps of 20MnCr5(SH) are obtained. It is therefore considered that 20MnCr5(SH) is most suitable for thermoplastic processing at strain rate of 0.05–1s−1 and temperature of 1030–1100 °C.

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Predicting Workability of a Low-Cost Powder Metallurgical Ti–5Al–2Fe–3Mo Alloy Using Constitutive Modeling and Processing Map

Cited by 9 publications

References 57 publications

Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD

Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD

Analysis of thermal deformation behavior and workability of 37CrS4 special steel

Strain Modified Constitutive Equation and Processing Maps of High Quality 20MnCr5(SH) Gear Steel

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