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Wang, Yu; Lin, Dongliang; Law, C. C.

doi:10.1023/a:1006723629430

Cited by 20 publications

(4 citation statements)

References 3 publications

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“…It is generally believed that when the activation energy of titanium alloy deformation is very different from the activation energy of self-diffusion, the softening mechanism may be dynamic recrystallization. Zener and Hollomon [26] proposed the Zener-Hollomon parameter, which represents the strain rate factor of temperature compensation, namely, parameter Z, and its expression is…”

Section: Constitutive Equation Based On Arrhenius Formulamentioning

confidence: 99%

Thermal Deformation Behavior of Ti-6Mo-5V-3Al-2Fe Alloy

et al. 2021

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The Gleeble-3800 thermal simulation machine was used to perform hot compression experiments on a new type of β alloy, Ti-6Mo-5V-3Al-2Fe (wt.%), at temperatures of 700–900 °C, strain rates of 5 × 10−1 to 5 × 10−4 s−1, and total strain of 0.7. Transmission and EBSD techniques were used to observe the microstructure. The results show that the deformation activation energy of the alloy was 356.719 KJ/mol, and dynamic recrystallization occurred during the hot deformation. The higher the deformation temperature was, the more obvious the dislocations that occurred and the more sufficient the dynamic recrystallization that occurred, but the effect of strain rate was the opposite. When the deformation temperature was higher than the phase transition point, the recrystallized grains clearly grew up. The calculated strain rate sensitivity index of the alloy was 0.14–0.29. The constitutive equation of hot deformation of Ti-6Mo-5V-3Al-2Fe alloy was established by using the Arrhenius hyperbolic sine equation. The dynamic DMM hot working diagram with the strain of 0.7 was constructed. The relatively good hot working area of the alloy was determined to be the deformation temperature of 700–720 °C and 0.0041–0.0005 s−1.

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Section: Constitutive Equation Based On Arrhenius Formulamentioning

confidence: 99%

Thermal Deformation Behavior of Ti-6Mo-5V-3Al-2Fe Alloy

et al. 2021

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“…The power law description of stress (Equation ( 1)) is preferred for relatively low stresses. Conversely, the exponential law (Equation ( 2)) is only suitable for high stresses [25,26]. However, the hyperbolic sine law (Equation ( 3)) can be used for a wide range of temperatures and strain rates [27].…”

Section: Constitutive Equationmentioning

confidence: 99%

Hot-Deformation Behavior and Microstructure Evolution of the Dual-Scale SiCp/A356 Composites Based on Optimal Hot-Processing Parameters

Song

Wang

Ma³

et al. 2020

Materials

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Hot deformation at elevated temperature is essential to densify particle-reinforced aluminum matrix composites (AMCs) and improve their performance. However, hot deformation behavior of the AMCs is sensitive to the variation of hot-processing parameters. In this paper, optimal processing parameters of dual-scale SiCp/A356 composites were determined to explore the control strategy of the microstructure. Hot-compression tests were conducted at temperatures ranging from 460 to 520 °C under strain rates from 0.01 to 5 s−1. Constitutive equation and processing maps were presented to determine the hot-processing parameters. Microstructure evolution of the dual-scale SiCp/A356 composites was analyzed. The strain rate of 0.62–5 s−1 and deformation temperature of 495–518 °C is suitable for the hot processing. The number of dynamic recrystallization (DRX) grains in the “safe” domains is larger and the dislocation density is lower compared to those of instability domains. DRX grains mainly occurred around SiC particles. The presence of SiC particles can promote effectively the DRX nucleation, which results in the dynamic softening mechanism of the dual-scale SiCp/A356 composites being dominated by DRX.

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“…The thermal deformation of the metal can be regarded as an extension of the creep at a large strain rate and a higher stress level, and therefore can be used by Zener-Hollomon factor Z [14] to described the relationship between the strain rate ε and temperature T,…”

Section: Effects Of Microporosity On Compression Behavior Of 6063 Alloymentioning

confidence: 99%

Influence of Microporosity Morphology on Hot Compression Behavior of 6063 Alloy

Cao

et al. 2013

AMR

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The influences of microporosity morphology on the flow stress behavior of 6063 alloy were investigated by isothermal compression test at 300°C-500°C and strain rate of 0.01-10s-1. After 60% compression, the area fraction of microporosity of sample having lage microporosity decreases obviously. The flow stress increases with increasing strain rate and decreasing temperature. The flow stress stress behavior of 6063 alloy during hot compression can be described by a Zener-Hollomon parameter including Arrhenius item. The increasing of area fraction of microporosity decreases the deformation activiation energy Q.

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Untitled

Cited by 20 publications

References 3 publications

Thermal Deformation Behavior of Ti-6Mo-5V-3Al-2Fe Alloy

Thermal Deformation Behavior of Ti-6Mo-5V-3Al-2Fe Alloy

Hot-Deformation Behavior and Microstructure Evolution of the Dual-Scale SiCp/A356 Composites Based on Optimal Hot-Processing Parameters

Influence of Microporosity Morphology on Hot Compression Behavior of 6063 Alloy

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