Static recrystallization kinetics of ferrite in cold-deformed medium carbon steel

Tavakoli, Mohammad; Mirzadeh, Hamed; Zamani, Mehran

doi:10.1088/2053-1591/ab6895

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…Therefore, the change in the grain size of austenite with the initial microstructure plays a pivotal role in determining the stabilization of austenite and triggering TRIP effect. [ 14–17 ] To obtain the ultrafine austenite phase, recrystallization is an effective method for refining the initial coarse grains or columnar grains. In actual production, diverse microstructural evolution mechanisms may take place, such as dynamic recrystallization (DRX), static recrystallization (SRX), metadynamic recrystallization (MDRX), and recovery, which determine the final microstructure and mechanical properties of the steel simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Kinetics of Static Recrystallization of Medium Mn Steel in the Two‐Hit Isothermal Compression

Sun

Zhang

Wang

et al. 2020

steel research int.

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The thermal deformation behavior and microstructure evolution of medium Mn steel (0.15C–7Mn) are investigated by the two‐hit compression tests. The results reveal that different static softening dynamics are the functions of deformation temperature, interval time, and strain rate. The short static softening plateaus are exhibited in the static softening curves during post‐deformation holding at 950 °C and 0.1, 1 s−1. Based on the electron backscatter diffraction (EBSD) analysis, the progresses of static recovery (SRV) and static recrystallization (SRX) are enhanced by the increment of deformation temperature. The frequencies of medium angle boundaries (MAGBs) and high angle boundaries (HAGBs) increase gradually with an increased interval time at 1000 °C and 0.1 s−1, which suggests that both SRV and SRX contribute to static softening, but the predominant softening mechanism is SRV. In addition, the influence of temperature, interval time, and strain rate on the distribution and average magnitude of grain size is investigated. The deformation temperature and strain rate have a significant influence not only on average grain dimension, but also on the distribution of grain size. Interval time has great influence on average grain size, but has slight effect on distribution of grain size.

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Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Kinetics of Static Recrystallization of Medium Mn Steel in the Two‐Hit Isothermal Compression

Sun

Zhang

Wang

et al. 2020

steel research int.

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“…Grain growth, essentially a grain boundary migration process, requires atomic diffusion, which accelerates with higher deformation temperatures, increasing the boundary migration rates, thus increasing the static recrystallization volume fraction. Related research [ 26 , 27 ] utilized multivariate nonlinear regression analysis to determine the coefficients and establish a model describing the static and dynamic recrystallization of steel microstructures. The study examined the influence of the initial grain size, deformation temperature, strain, and strain rate on the austenite recrystallization volume fraction and grain size.…”

Section: Discussionmentioning

confidence: 99%

The Performance of Niobium-Microalloying Ultra-High-Strength Bridge Cable Steel during Hot Rolling

Zhou,

Yu,

Chen

et al. 2024

Materials

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This study focuses on exploring the effects of niobium (Nb)-microalloying on the properties of steel for ultra-high-strength bridge cables during hot-rolling processes. We employed a combination of dual-pass compression tests, stress–strain curve analysis, and Electron Backscatter Diffraction (EBSD) techniques to investigate the influence of Nb-microalloying on the static recrystallization behavior and grain size of the steel. The key findings reveal that Nb-microalloying effectively inhibits static recrystallization, particularly at higher temperatures, significantly reducing the volume fraction of recrystallized grains, resulting in a finer grain size and enhanced deformation resistance. Secondly, at a deformation temperature of 975 °C, Nb-containing steel exhibited finer grain sizes compared to Nb-free steel when held for 10 to 50 s; however, the grain size growth accelerated when the hold time exceeded 50 s, likely linked to the increased deformation resistance induced by Nb. Lastly, this research proposes optimal hot-rolling process parameters for new bridge cable steel, recommending specific finishing rolling temperatures and inter-pass times for both Nb-containing and Nb-free steels during the roughing and finishing stages. This study suggests optimal hot-rolling parameters for both Nb-containing and Nb-free steels, providing essential insights for improving hot-rolling and microalloying processes in high-carbon steels for bridge cables.

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“…It should be noted that the lower critical temperature Ac 1 of 727°C and the upper critical temperature Ac 3 of 805°C were determined based on dilatometry as reported in Refs. [21,22]. The as-quenched steel was tempered for holding times up to 4 h at subcritical temperatures of 550°C, 600°C, 640°C, and 700°C.…”

Section: Methodsmentioning

confidence: 99%

Tempering kinetics and corrosion resistance of quenched and tempered AISI 4130 medium carbon steel

Mosayebi

Soleimani

Mirzadeh

et al. 2021

Materials & Corrosion

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The kinetics and the effects of tempering on the corrosion resistance of AISI 4130 steel were studied. The tempering activation energy was close to that for the diffusion of C in α-iron. This implies that the tempering kinetics in this steel is controlled by carbon diffusion. By increasing the time and temperature of tempering, the corrosion current density (i corr ) in the polarization curves decreased whereas the diameter of the semicircular arc in the Nyquist plots increased, which implies higher corrosion resistance. The i corr was successfully related to hardness, which actually indicates the effect of microstructure.Based on these findings, the quench and tempering treatment was used to adjust both the hardness and corrosion resistance of the AISI 4130 steel.

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Static recrystallization kinetics of ferrite in cold-deformed medium carbon steel

Cited by 7 publications

References 28 publications

Microstructure Evolution and Kinetics of Static Recrystallization of Medium Mn Steel in the Two‐Hit Isothermal Compression

Microstructure Evolution and Kinetics of Static Recrystallization of Medium Mn Steel in the Two‐Hit Isothermal Compression

The Performance of Niobium-Microalloying Ultra-High-Strength Bridge Cable Steel during Hot Rolling

Tempering kinetics and corrosion resistance of quenched and tempered AISI 4130 medium carbon steel

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