Effectiveness of hot deformation and subsequent annealing for β grain refinement of Ti–5Al–5Mo–5V–1Cr–1Fe titanium alloy

Cui, Yimin; Zheng, Wen-Chen; Li, Chaohua; Cao, Guan-Hua; Wang, Yandong

doi:10.1007/s12598-020-01677-x

Cited by 22 publications

(7 citation statements)

References 29 publications

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“…The Arrhenius constitutive model has been widely used due to its high accuracy and wide generalizability. The model was first proposed by Sellars and McTegart [29], and its specific form is presented in Equation (1).…”

Section: Arrhenius Modelmentioning

confidence: 99%

“…ε is the strain rate (s −1 ), σ is flow stress (MPa). In Equation (1), the effect of strain on flow stress was not considered. In recent years, most scholars consider how to take the effect of strain into account [20].…”

Section: Arrhenius Modelmentioning

confidence: 99%

“…In recent years, most scholars consider how to take the effect of strain into account [20]. Equation ( 2) can be obtained by logarithmic transform in Equation (1).…”

Section: Arrhenius Modelmentioning

confidence: 99%

“…The Ti6242s alloy, a typical high-temperature titanium alloy, is widely used in high-pressure compressor disks and blades in aeroengines; these parts are usually manufactured by a hot-working process [ 1 , 2 ], such as hot forging, hot extrusion, hot roll forging, etc. The most important purpose of hot-working processes is that metals are deformed into the desired shapes under certain thermomechanical processing conditions to obtain the appropriate microstructure and mechanical performance [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

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The Quadratic Constitutive Model Based on Partial Derivative and Taylor Series of Ti6242s Alloy and Predictability Analysis

et al. 2023

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To solve the problem of insufficient predictability in the classical models for the Ti6242s alloy, a new constitutive model was proposed, based on the partial derivatives from experimental data and the Taylor series. Firstly, hot compression experiments on the Ti6242s alloy at different temperatures and different strain rates were carried out, and the Arrhenius model and Hensel–Spittel model were constructed. Secondly, the partial derivatives of logarithmic stress with respect to temperature and logarithmic strain rate at low, medium and high strain levels were analyzed. Thirdly, two new constitutive models with first- and second-order approximation were proposed to meet the requirements of high precision. In this new model, by analyzing the high-order differential data of experimental data and combining the Taylor series theory, the minimum number of terms that can accurately approximate the experimental rheological data was found, thereby achieving an accurate prediction of flow stress with minimal material parameters. In the new model, by analyzing the high-order differential of the experimental data and combining the theory of the Taylor series, the minimum number of terms that can accurately approximate the experimental rheological data was found, thereby achieving an accurate prediction of flow stress with minimal material parameters. Finally, the prediction accuracies for the classical model and the new model were compared, and the predictabilities for the classical models and the new model were proved by mathematical means. The results show that the prediction accuracies of the Arrhenius model and the Hensel–Spittel model are low in the single-phase region and high in the two-phase region. In addition, second-order approximation is required between the logarithmic stress and logarithmic strain rate, and first-order approximation is required between logarithmic stress and temperature to establish a high-precision model. The order of prediction accuracy of the four models from high to low is the quadratic model, Arrhenius model, linear model and HS model. The prediction accuracy of the quadratic model in all temperatures and strain rates had no significant difference, and was higher than the other models. The quadratic model can greatly improve prediction accuracy without significantly increasing the material parameters.

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Section: Arrhenius Modelmentioning

confidence: 99%

Section: Arrhenius Modelmentioning

confidence: 99%

“…In recent years, most scholars consider how to take the effect of strain into account [20]. Equation ( 2) can be obtained by logarithmic transform in Equation (1).…”

Section: Arrhenius Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Quadratic Constitutive Model Based on Partial Derivative and Taylor Series of Ti6242s Alloy and Predictability Analysis

et al. 2023

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“…Titanium and titanium alloys have good corrosion resistance, high temperature resistance, low temperature resistance and high specific strength, which are widely used in petroleum engineering, engine blades, marine engineering and other fields [1][2] . TC18 alloy is a kind of titanium alloy containing rich β-stable elements, which has high specific strength and good hardenability, and is widely used in the fields of aero-engine blades and aerospace aircraft load-bearing frames [3] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Furnace Cold Annealing on Microstructure and Tensile Properties of TC18 Titanium Alloy

Zhang¹,

Zhang

Pan³

et al. 2022

J. Phys.: Conf. Ser.

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TC18 alloy bars were annealed at different temperatures, and then the tensile properties were tested. The effects of different furnace cooling temperatures on the microstructure and tensile properties of the alloy were analyzed by optical microscope and scanning electron microscope. The results show that after furnace cooling at different temperatures, the size, distribution and appearance of α phase in the microstructure are changed to varying degrees. With the increase of temperature, the α phase in the microstructure disappears, the elongated α phase becomes thinner, the grain boundary α phase appears, and the obvious β grain appears. The strength of the alloy increases with the increase of temperature, and the plasticity shows the opposite trend. The maximum tensile strength is 1131 MPa, the maximum yield strength is 992 MPa, the maximum elongation is 14 %, and the maximum section shrinkage is 34 %. When the temperature is in the two-phase region, the morphology is mainly dimples, and the dimple morphology is large and deep. When the heating temperature is in the single-phase region, the fracture morphology is mainly crystalline, with tearing edges and a small amount of shallow dimples distributed on the surface.

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Hot Deformation Behavior and Processing Map of Nimonic 105 Superalloy for 700 °C Advanced Ultra-supercritical Power Plants

Peng

Xin

et al. 2022

J. of Materi Eng and Perform

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Effectiveness of hot deformation and subsequent annealing for β grain refinement of Ti–5Al–5Mo–5V–1Cr–1Fe titanium alloy

Cited by 22 publications

References 29 publications

The Quadratic Constitutive Model Based on Partial Derivative and Taylor Series of Ti6242s Alloy and Predictability Analysis

The Quadratic Constitutive Model Based on Partial Derivative and Taylor Series of Ti6242s Alloy and Predictability Analysis

Effect of Furnace Cold Annealing on Microstructure and Tensile Properties of TC18 Titanium Alloy

Hot Deformation Behavior and Processing Map of Nimonic 105 Superalloy for 700 °C Advanced Ultra-supercritical Power Plants

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