Hot deformation behavior, dynamic recrystallization mechanism and processing maps of Ti–V microalloyed high strength steel

Zhang, K.; Zhang, Tenghao; Zhang, Mingya; Chen, Z.; Pan, Hucheng; Yang, Gengwei; Cao, Yi; Li, Zhaodong; Zhang, Xi

doi:10.1016/j.jmrt.2023.06.195

Cited by 30 publications

(5 citation statements)

References 23 publications

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“…𝐽 𝐽 (10) In the context of metals undergoing thermoplastic deformation, it is observed that a higher value of η corresponds to a more favorable thermoplastic deformation effect However, it is important to note that the suitability of thermal process parameters for thermal processing cannot solely rely on a large value of η, as the presence of microstructure defects must also be considered. In certain cases, defective microstructures may coexist with a high η value.…”

Section: 𝜂 =mentioning

confidence: 99%

“…The power dissipation efficiency, denoted as η, is defined as the ratio of the energy consumed for the evolution of the microstructure during thermal deformation to J max (Equation ( 10)). η = J J max (10) In the context of metals undergoing thermoplastic deformation, it is observed that a higher value of η corresponds to a more favorable thermoplastic deformation effect. However, it is important to note that the suitability of thermal process parameters for thermal processing cannot solely rely on a large value of η, as the presence of microstructure defects must also be considered.…”

Section: Research and Construction Of A Processing Mapmentioning

confidence: 99%

“…The hot deformation behavior of metals was affected strongly by deformation parameters, such as deformation temperature, strain rate, and strain, as well as by the characteristics of secondary phases [9][10][11]. Chen conducted a study on the thermal deformation behavior of 17Cr2Ni2MoVNb and 20Cr2Ni4A gear steels, revealing that both caused dynamic recrystallization at low strain rates and high deformation temperatures [12].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Hot Deformation Behavior and Processing Maps Based on Murty Criterion of SAE8620RH Gear Steel

Chen,

Li,

Zhu

2023

Metals

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The hot deformation behavior and microstructure evolution of the SAE8620RH gear steel were investigated through a single-pass hot compression test at deformation temperatures between 850 and 1100 °C and strain rates between 0.02 and 8.0 s−1 by 60% reduction. A novel strain compensation constitutive model was developed, and the 2D processing maps were established by Murty’s criterion. Results showed that the relationship between material-related parameters and strain can be mathematically expressed by a highly reliable 8th-order polynomial. The constructed strain compensation constitutive model demonstrated remarkable predictive precision, as evidenced by the correlation coefficient (R) and the absolute values of average relative error (AARE) of 0.978 and 4%, respectively. The flow instability domains considerably expanded towards the high deformation temperature region as the strain increased. Microstructure analysis confirmed the accuracy of the processing map constructed by Murty’s criterion. The most noticeable optimum processing windows for SAE8620RH gear steel at a strain of 0.7 occurred within the temperature range of 1000–1100 °C and the strain rate range of 0.3–1.0 s−1, due to high η values exceeding 0.3 and equiaxial dynamic recrystallization microstructure.

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Section: 𝜂 =mentioning

confidence: 99%

Section: Research and Construction Of A Processing Mapmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of Hot Deformation Behavior and Processing Maps Based on Murty Criterion of SAE8620RH Gear Steel

Chen,

Li,

Zhu

2023

Metals

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“…Therefore, when using titanium microalloying technology, researchers often add other microalloying elements in combination, such as Ti-Nb, Ti-V, Ti-Nb-V, etc. [3][4][5][6][7][8] Currently, microalloying technology combined with controlled rolling and cooling processes is one of the most effective methods for producing low-cost, highstrength steels. 9 The precipitation of microalloyed elements in hot deformed austenite and the recrystallization of the deformed austenite are particularly important during the control rolling process to achieve optimal microstructure and properties.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, when using titanium microalloying technology, researchers often add other microalloying elements in combination, such as Ti-Nb, Ti-V, Ti-Nb-V, etc. 3–8…”

Section: Introductionmentioning

confidence: 99%

Effect of Zr on static recrystallization of deformed austenite and strain-induced precipitation in Ti microalloyed steel

Luo,

Liu,

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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The static recrystallization and strain-induced precipitation behavior of Ti and Ti-Zr low carbon microalloyed steels were studied through isothermal stress relaxation experiments at different deformation temperatures (875–1025 °C). The precipitation kinetic curves of microalloyed carbides were obtained, and the effect of Zr on the precipitation kinetics of microalloyed carbides was analyzed. Two static recrystallization kinetic models were established, and the activation energies for static recrystallization of Ti steel and Ti-Zr steel were calculated to be 312.44 and 246.59 kJ/mol, respectively. The results indicate that the addition of Zr lowers the nose point temperature of the precipitation–time–temperature curve, shortens the incubation period for the nucleation of precipitates, promotes the nucleation of strain-induced precipitates in Ti microalloyed steel, and reduces the coarsening rate of precipitates particles by an order of magnitude. In addition, the addition of Zr also advances the end time of static recrystallization of deformed austenite, inhibits the growth of static recrystallization austenite grains in Ti steel during the isothermal process, and makes the austenite grains finer and more uniform.

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Constitutive Modeling for Flow Stress and Processing Maps of a 0.2C–2.0Mn–0.5Cr Microalloyed Steel

Feng,

Zhang,

Zhang

et al. 2023

steel research int.

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Low‐carbon microalloyed steel with the microstructure of bainite is frequently utilized to produce automotive parts. The systematic investigation of the hot deformation behavior can serve as a reference for the optimization of deformation process parameters. The hot deformation of 0.2C–2.0Mn–0.5Cr microalloyed steel is studied. Based on the stress–strain curve, an Arrhenius model with strain compensation is established. The correlation coefficient R2 and the average absolute relative error calculated according to this model are 0.962 and 4.871%. The microstructure evolution at the strain of 0.90 is studied. In the stable region with substantial power dissipation, the microstructure is uniformly fine. The strain rate is high in the stable region with low‐power dissipation, and the room‐temperature microstructure after deformation retains a large amount of deformation storage energy and fine substructures. During deformation, the banded structures are formed in the instable region. The difference in dislocation density between the band structure and the nearby regions promotes the formation of necklace microstructures. Therefore, the 0.2C–2.0Mn–0.5Cr microalloyed steel has an ideal deformation process window in the range of a hot deformation temperature of 880–920 °C and a strain rate of 0.1–0.3 s−1.

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Hot deformation behavior, dynamic recrystallization mechanism and processing maps of Ti–V microalloyed high strength steel

Cited by 30 publications

References 23 publications

Characterization of Hot Deformation Behavior and Processing Maps Based on Murty Criterion of SAE8620RH Gear Steel

Characterization of Hot Deformation Behavior and Processing Maps Based on Murty Criterion of SAE8620RH Gear Steel

Effect of Zr on static recrystallization of deformed austenite and strain-induced precipitation in Ti microalloyed steel

Constitutive Modeling for Flow Stress and Processing Maps of a 0.2C–2.0Mn–0.5Cr Microalloyed Steel

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