Metadynamic recrystallization behavior and workability characteristics of HR3C austenitic heat-resistant stainless steel with processing map

Cheng, Yong; Du, Hao; Wei, Yinghui; Hou, Lifeng; Liu, Baosheng

doi:10.1016/j.jmatprotec.2016.04.026

Cited by 29 publications

(16 citation statements)

References 27 publications

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“…6, and the value of n is obtained as the slope of the trend line, resulting here in an mean value of 0.43. However, this value is lower than the range of 1-1.6 generally reported for low alloy steels by Sellars and Davies [27], that indicated that this martensitic stainless steel has a lower recrystallization rate compared to low alloy steels [28]. Since the initial grain size is the same for different deformation conditions, the t0.5 can be represented by a simplified expression as follows:…”

Section: Recrystallization Kineticsmentioning

confidence: 75%

Grain growth behaviour of an AISI 422 martensitic stainless steel after hot deformation process

Ahmadabadi

Naderi

Mohandesi

et al. 2018

Canadian Metallurgical Quarterly

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The metadynamic softening behavior and grain size refinement of an AISI 422 martensitic stainless steel in the temperature range of 950-1150 ºC was investigated by double-hit compression tests. The deformed specimens were held at deformation temperature with delay times of 5 to300s after achieving a strain of 0.3. The results indicated that at deformation temperatures lower than 1050 ºC, the final average grain size decreases with increasing time, attaining a minimum value at 15s,. However, grain coarsening was observed at deformation temperatures of 1150 and 1100 ºC. Based on the experimental results, a model was established for estimation of the softening fraction at different deformation parameters. The finer grain size was achieved by prior fine pre-austenite grain and lower secondary deformation temperature. The initial grain size of ASTM 5.5 decreased down toASTM7 to ASTM 8.5 at the deformation temperatures of 1020 ºC and 940 ºC, respectively. More uniform grain distribution was obtained with decreasing initial grain size especially at lower deformation temperatures.

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Section: Recrystallization Kineticsmentioning

confidence: 75%

Grain growth behaviour of an AISI 422 martensitic stainless steel after hot deformation process

Ahmadabadi

Naderi

Mohandesi

et al. 2018

Canadian Metallurgical Quarterly

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“…6b, big grains were formed, and tiny grains between the grain boundaries were observed, which indicated the growth of recrystallised grains. It was pointed that because recrystallisation activation energy increased with deformation temperature, dislocation motion and crystal slip were promoted, which enhanced grain-boundary migration, facilitating nu- cleation and growth of DRX grains [37]. In summary, although it was possible to cause incomplete recrystallisation by reducing the temperature of hot deformation or increasing the strain rate, it showed a favourable impact on grain refinement when complete recrystallisation occurred.…”

Section: Grain Size Measurementmentioning

confidence: 99%

Hot deformation analysis of lean medium-manganese 0.2C3Mn1.5Si steel suitable for quenching et partitioning process

Krbaťa¹,

Barényi²,

Eckert³

et al. 2021

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The paper mainly focuses on calculating and comparing a mathematical model of the deformation behaviour at high temperatures. Analysis of the high-temperature plastic behaviour of lean medium-manganese steel 0.2C3Mn1.5Si was carried out in the temperature range of 900-1200 • C and the deformation rate in the range of 0.01-10 s −1 to the maximum value of the true strain 0.8. Microstructural changes were observed using light optical microscopy (LOM) and scanning electron microscopy (SEM). The effect of hot deformation temperature on true stress, peak stress, and the true strain was evaluated using the flow curves. Based on these results, transformations in steel were discussed from the dynamic recovery and recrystallisation point of view. Furthermore, a present model, taking into account the Zener-Hollomon parameter, was applied to predict the true stress and strain over a wide range of temperatures and strain rates. Using constitutive equations, material parameters and activation energy for the investigated steel could be derived. Results demonstrate the use of the model for lean medium-Mn quenching and partitioning steel (Q&P) compositions in hot deformation applications with acceptable accuracy.

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“…As shown in Figures 11(c)-11(e), big grains were formed and tiny grains between the grain boundaries were observed, which indicated the growth of recrystallized grains. It was pointed that because recrystallization activation energy increased with deformation temperature, dislocation motion and crystal slip were promoted, which enhanced grain-boundary migration, facilitating nucleation and growth of DRX grains [40]. In summary, although it was possible to cause incomplete recrystallization by reducing the temperature of hot deformation or increasing the strain rate, it showed favorable impact on grain refinement when complete recrystallization occurred.…”

Section: Microstructure Observationsmentioning

confidence: 99%

Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming

Wang

2020

Advances in Materials Science and Engineering

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The dynamic recrystallization (DRX) behavior of 5CrNiMoV steel was investigated through hot compression at temperatures of 830–1230°C and strain rates of 0.001–10 s−1. From the experimental results, most true stress-strain curves showed the typical nature of DRX that a single peak was reached at low strains followed by a decrease of stress and a steady state finally at relatively high strains. The constitutive behavior of 5CrNiMoV steel was analyzed to deduce the operative deformation mechanisms, and the correlation between flow stress, temperature, and strain rate was expressed as a sine hyperbolic type constitutive equation. Based on the study of characteristic stresses and strains on the true stress-strain curves, a DRX kinetics model was constructed to characterize the influence of true strain, temperature, and strain rate on DRX evolution, which revealed that higher temperatures and lower strain rates had a favorable influence on improving the DRX volume fraction at the same true strain. Microstructure observations indicated that DRX was the main mechanism and austenite grains could be greatly refined by reducing the temperature of hot deformation or increasing the strain rate when complete recrystallization occurred. Furthermore, a DRX grain size model of 5CrNiMoV was obtained to predict the average DRX grain size during hot forming.

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Metadynamic recrystallization behavior and workability characteristics of HR3C austenitic heat-resistant stainless steel with processing map

Cited by 29 publications

References 27 publications

Grain growth behaviour of an AISI 422 martensitic stainless steel after hot deformation process

Grain growth behaviour of an AISI 422 martensitic stainless steel after hot deformation process

Hot deformation analysis of lean medium-manganese 0.2C3Mn1.5Si steel suitable for quenching et partitioning process

Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming

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