Static Recrystallization Behavior of Z12CN13 Martensite Stainless Steel

Luo, Min; Zhou, Bing; Li, Rongbin; Xu, Chun; Guo, Yanhui

doi:10.1007/s11665-017-2847-8

Cited by 6 publications

(2 citation statements)

References 32 publications

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“…The OM observation shows in figure 13(a) also clarify this nucleation mechanism. The possibility of recrystallization through this mechanism depends on the distance between carbide particles and dislocation density in martensite [41,42]. Due to the studied steel in this paper belongs to the low carbon steel, dislocation density of martensite played an important role.…”

Section: Srx Softening Mechanism During Inter-pass Timementioning

confidence: 99%

A modified kinetics model and softening behavior for static recrystallization of 12Cr ultra-super-critical rotor steel

Zhao

Liu

2020

Mater. Res. Express

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In this paper, the static recrystallization (SRX) of 12Cr ultra-super-critical (USC) rotor steel was investigated by a series of hot compression tests on a Gleeble1500D thermal simulator. Double-hit hot deformation tests were conducted at temperatures of 1223K-1323 K and strain rates of 0.001 s −1 -0.1 s −1 with inter-pass times of 10s-180 s. A conventional kinetics model of SRX was established based on flow curves obtained by regression analysis under different deformation conditions. However, a significant deviation resulted between predicted and experimental values for the SRX fraction, and therefore a modified kinetics equation was proposed by analysing the SRX characteristics and possession of the capability to accurately predict SRX softening behaviour was confirmed. Effects of hot deformation parameters on SRX softening behaviour and SRX grain size were discussed. Furthermore, microstructure deforming was observed at different inter-pass times with an optical microscope (OM), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM). Analysis showed that recovery was the main softening mechanism and the fundamental nucleation mechanism for SRX was bulging at the grain boundary.

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Section: Srx Softening Mechanism During Inter-pass Timementioning

confidence: 99%

A modified kinetics model and softening behavior for static recrystallization of 12Cr ultra-super-critical rotor steel

Zhao

Liu

2020

Mater. Res. Express

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“…They extensively discussed the flow behavior variations and microstructure under various deformation conditions, identifying the primary SRX mechanism as strain-induced boundary migration. In a separate study, Luo et al [14] investigated the SRX behavior of Z12CN13 martensite stainless steel through double compression tests. Their research revealed that the main nucleation mechanism was bulging at grain boundaries, while undissolved precipitates, such as MoNi 3 and Fe 3 C, retarded the recrystallization kinetics.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Static Recrystallization Behavior of 22MnB5 Manganese–Boron Steel through Stress Relaxation Analysis

Birnbaum,

Pilz,

Neufeld

et al. 2023

Metals

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A constitutive model was developed to characterize the static recrystallization (SRX) and evolution of the grain size of the industrially relevant press-hardening steel, 22MnB5, subsequent to the hot forming of sheet metal. Isothermal stress relaxation tests were conducted using the BAEHR 805 A/D thermomechanical simulator, encompassing a temperature range of 950 to 1050 °C, prestrain levels ranging from 0.01 to 0.1, and strain rates spanning from 0.01 to 0.8 s−1. The results obtained from the isothermal stress relaxation tests facilitated the formulation of an Avrami equation-based model, which aptly describes the kinetics of SRX in relation to the temperature, prestrain, and strain rate. Notably, an increase in temperature led to accelerated recrystallization kinetics, signifying temperature-dependent behavior. When the temperature increased from 950 to 1050 °C, the recrystallization time was reduced to approximately one-third. Additionally, the prestrain exhibited a positive influence on the acceleration of SRX kinetics. A quintupling of the prestrain from 0.01 to 0.05 resulted in a reduction of the static recrystallization duration to approximately one-fifth. Among the parameters studied, the strain rate had the least impact on the SRX kinetics, as doubling the strain rate from 0.01 to 0.8 only resulted in a halving of the recrystallization duration. Moreover, an analysis of the microstructural evolution in response to the forming parameters was undertaken. While the grain-size investigation post-isothermal stress relaxation tests provided results in line with the SRX kinetics calculations, the observed effects were comparatively subdued. Furthermore, a comprehensive examination was conducted using electron backscatter diffraction (EBSD) analysis, aiming to explore the effects of specific stress relaxation states on the morphology of martensite. The findings reveal fully recrystallized globulitic microstructures, characterized by relatively minor differences among them.

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